Puruṣa is the witness-consciousness. It is absolute, independent, free, beyond perception, above any experience by mind or senses, and impossible to describe in words.[5][6][7]
Prakriti is matter or nature. It is inactive, unconscious, and is a balance of the threeguṇas (qualities or innate tendencies),[8][9] namelysattva,rajas, andtamas. WhenPrakṛti comes into contact withPurusha this balance is disturbed, andPrakriti becomes manifest, evolving twenty-threetattvas,[10] namely intellect (buddhi,mahat), I-principle (ahamkara), mind (manas); the five sensory capacities known as ears, skin, eyes, tongue and nose; the five action capacities known as hands (hasta), feet (pada), speech (vak), anus (guda), and genitals (upastha); and the five "subtle elements" or "modes of sensory content" (tanmatras), from which the five "gross elements" or "forms of perceptual objects" (earth, water, fire, air and space) emerge,[8][11] in turn giving rise to the manifestation of sensory experience and cognition.[12][13]
Jiva ('a living being') is the state in whichPuruṣa is bonded toPrakriti.[14] Human experience is an interplay of the two,Puruṣa being conscious of the various combinations of cognitive activities.[14] The end of the bondage ofPuruṣa toPrakriti is calledMoksha (Liberation) orKaivalya (Isolation).[15]
Samkhya'sepistemology accepts three of sixpramaṇas ('proofs') as the only reliable means of gaining knowledge, as doesyoga. These arepratyakṣa ('perception'),anumāṇa ('inference') andśabda (āptavacana, meaning, 'word/testimony of reliable sources').[16][17][18] Sometimes described as one of therationalist schools ofIndian philosophy, it relies exclusively on reason.[19][20]
While Samkhya-like speculations can be found in the Rig Veda and some of the older Upanishads, some western scholars have proposed that Samkhya may have non-Vedic origins,[21][note 1] developing in ascetic milieus. Proto-Samkhya ideas developed c. 8th/7th BC and onwards, as evidenced in the middle Upanishads, theBuddhacharita, theBhagavad Gita, and theMokshadharma-section of theMahabharata.[22] It was related to the early ascetic traditions and meditation, spiritual practices, and religious cosmology,[23] and methods of reasoning that result in liberating knowledge (vidya,jnana,viveka) that end the cycle ofduḥkha (suffering) and rebirth[24] allowing for "a great variety of philosophical formulations".[23] Pre-Karika systematic Samkhya existed around the beginning of the first millennium CE.[25] The defining method of Samkhya was established with theSamkhyakarika (4th c. CE).
Samkhya might have been theistic or nontheistic, but with its classical systematization in the early first millennium CE, the existence of a deity became irrelevant.[26][27][28][29] Samkhya is strongly related to theYoga school ofHinduism, for which it forms the theoretical foundation, and it has influenced other schools of Indian philosophy.[30]
Sāṃkhya (सांख्य) orsāṅkhya, also transliterated assamkhya andsankhya, respectively, is aSanskrit word that, depending on the context, means 'to reckon, count, enumerate, calculate, deliberate, reason, reasoning by numeric enumeration, relating to number, rational'.[32] In the context of ancient Indian philosophies,Samkhya refers to the philosophical school in Hinduism based on systematic enumeration and rational examination.[33]
The wordsamkhya means 'empirical' or 'relating to numbers'.[34] Although the term had been used in the general sense of metaphysical knowledge before,[35] in technical usage it refers to the Samkhya school of thought that evolved into a cohesive philosophical system in early centuries CE.[36] The Samkhya system is called so because 'it "enumerates'" twenty fiveTattvas or true principles; and its chief object is to effect the final emancipation of the twenty-fifth Tattva, i.e. the puruṣa or soul'.[34]
Samkhya makes a distinction between two "irreducible, innate and independent realities",[37]Purusha, the witness-consciousness, andPrakṛti, "matter", the activities of mind and perception.[4][38][39] According to Dan Lusthaus,
In Sāṃkhya puruṣa signifies the observer, the 'witness'. Prakṛti includes all the cognitive, moral, psychological, emotional, sensorial and physical aspects of reality. It is often mistranslated as 'matter' or 'nature' – in non-Sāṃkhyan usage it does mean 'essential nature' – but that distracts from the heavy Sāṃkhyan stress on prakṛti's cognitive, mental, psychological and sensorial activities. Moreover, subtle and gross matter are its most derivative byproducts, not its core. Only prakṛti acts.[4]
Puruṣa is considered as the conscious principle, a passive enjoyer (bhokta) and thePrakṛti is the enjoyed (bhogya). Samkhya believes that the puruṣa cannot be regarded as the source of inanimate world, because an intelligent principle cannot transform itself into the unconscious world. It is a pluralistic spiritualism, atheistic realism and uncompromising dualism.[40]
Puruṣa is the witness-consciousness. It is absolute, independent, free, imperceptible, unknowable through other agencies, above any experience by mind or senses and beyond any words or explanations. It remains pure, "nonattributive consciousness".Puruṣa is neither produced nor does it produce.[5] No appellations can qualifyPurusha, nor can it be substantialized or objectified.[6] It "cannot be reduced, can't be 'settled'". Any designation ofPurusha comes fromPrakriti, and is a limitation.[7] UnlikeAdvaita Vedanta, and likePurva-Mīmāṃsā, Samkhya believes in plurality of thePuruṣas.[5] However, while being multiple,Puruṣas are considered non-different because their essential attributes are the same.[41]
Prakṛti is the first cause of the world of our experiences.[10] Since it is the first principle (tattva) of the universe, it is called thepradhāna (chief principle), but, as it is the unconscious and unintelligent principle, it is also called thejaḍa (unintelligent). It is composed of three essential characteristics (trigunas). These are:
Sattva – poise, fineness, lightness, illumination, and joy;
Tamas – inertia, coarseness, heaviness, obstruction, and sloth.[40][42][43]
UnmanifestedPrakriti is infinite, inactive, and unconscious, with the three gunas in a state of equilibrium. When this equilibrium of theguṇas is disturbed then unmanifestPrakṛti, along with the omnipresent witness-consciousness,Purusha, gives rise to the manifest world of experience.[12][13]Prakriti becomes manifest as twenty-threetattvas:[10] intellect (buddhi, mahat), ego (ahamkara) mind (manas); the five sensory capacities; the five action capacities; and the five "subtle elements" or "modes of sensory content" (tanmatras: form (rūpa), sound (shabda), smell (gandha), taste (rasa), touch (sparsha)), from which the five "gross elements" or "forms of perceptual objects" emerge (earth (prithivi), water (jala), fire (Agni), air (Vāyu), ether (Ākāsha)).[44][11]Prakriti is the source of our experience; it is not "the evolution of a series of material entities," but "the emergence of experience itself".[12] It is description of experience and the relations between its elements, not an explanation of the origin of the universe.[12]
AllPrakriti has these threeguṇas in different proportions. Eachguṇa is dominant at specific times of day. The interplay of theseguṇa defines the character of someone or something, of nature and determines the progress of life.[45][46] The Samkhya theory ofguṇa was widely discussed, developed and refined by various schools of Indian philosophies. Samkhya's philosophical treatises also influenced the development of various theories of Hindu ethics.[30]
Thought processes and mental events are conscious only to the extent they receive illumination fromPurusha. In Samkhya, consciousness is compared to light which illuminates the material configurations or 'shapes' assumed by the mind. So intellect, after receiving cognitive structures from the mind and illumination from pure consciousness, creates thought structures that appear to be conscious.[47] Ahamkara, the ego or the phenomenal self, appropriates all mental experiences to itself and thus, personalizes the objective activities of mind and intellect by assuming possession of them.[48] But consciousness is itself independent of the thought structures it illuminates.[47]
The Supreme Good is mokṣa which consists in the permanent impossibility of the incidence of pain... in the realisation of the Self as Self pure and simple.
Samkhya regards ignorance (avidyā) as the root cause of suffering and bondage (Samsara). Samkhya states that the way out of this suffering is through knowledge (viveka).Mokṣa (liberation), states Samkhya school, results from knowing the difference betweenPrakṛti (avyakta-vyakta) andPuruṣa (jña).[16] More specifically, thePuruṣa that has attained liberation is to be distinguished from aPuruṣa that is still bound on account of the liberatedPuruṣa being free from its subtle body (synonymous with buddhi), in which is located the mental dispositions that individuates it and causes it to experience bondage.[52]: 58
Puruṣa, the eternal pure consciousness, due to ignorance, identifies itself with products ofPrakṛti such as intellect (buddhi) and ego (ahamkara). This results in endless transmigration and suffering. However, once the realization arises thatPuruṣa is distinct fromPrakṛti, is more than empirical ego, and that puruṣa is deepest conscious self within, theSelf gains isolation (kaivalya) and freedom (moksha).[53]
Though in conventional terms the bondage is ascribed to thePuruṣa, this is ultimately a mistake. This is because the Samkhya school (Samkhya karika Verse 63) maintains that it is actuallyPrakriti that binds itself, and thus bondage should in reality be ascribed toPrakriti, not to thePuruṣa:[54]
By seven modes nature binds herself by herself: by one, she releases (herself), for the soul's wish (Samkhya karika Verse 63) ·
Vacaspati gave a metaphorical example to elaborate the position that thePuruṣa is only mistakenly ascribed bondage: although the king is ascribed victory or defeat, it is actually the soldiers that experience it.[55] It is then not merely that bondage is only mistakenly ascribed to thePuruṣa, but that liberation is like bondage, wrongly ascribed to thePuruṣa and should be ascribed toPrakriti alone.[52]: 60
Other forms of Samkhya teach thatMokṣa is attained by one's own development of the higher faculties of discrimination achieved by meditation and other yogic practices.Moksha is described by Samkhya scholars as a state of liberation, wheresattva guṇa predominates.[15]
The Samkhya school considers perception, inference and reliable testimony as three reliable means to knowledge.[16][17]
Samkhya consideredPratyakṣa orDṛṣṭam (direct sense perception),Anumāna (inference), andŚabda orĀptavacana (verbal testimony of the sages or shāstras) to be the only valid means of knowledge orpramana.[16] Unlike some other schools, Samkhya did not consider the following threepramanas to be epistemically proper:Upamāṇa (comparison and analogy),Arthāpatti (postulation, deriving from circumstances) orAnupalabdi (non-perception, negative/cognitive proof).[17]
Pratyakṣa (प्रत्यक्ष) means perception. It is of two types in Hindu texts: external and internal. External perception is described as that arising from the interaction of five senses and worldly objects, while internal perception is described by this school as that of inner sense, the mind.[56][57] The ancient and medieval Indian texts identify four requirements for correct perception:[58]Indriyarthasannikarsa (direct experience by one's sensory organ(s) with the object, whatever is being studied),Avyapadesya (non-verbal; correct perception is not throughhearsay, according to ancient Indian scholars, where one's sensory organ relies on accepting or rejecting someone else's perception),Avyabhicara (does not wander; correct perception does not change, nor is it the result of deception because one's sensory organ or means of observation is drifting, defective, suspect) andVyavasayatmaka (definite; correct perception excludes judgments of doubt, either because of one's failure to observe all the details, or because one is mixing inference with observation and observing what one wants to observe, or not observing what one does not want to observe).[58] Some ancient scholars proposed "unusual perception" aspramana and called it internal perception, a proposal contested by other Indian scholars. The internal perception concepts includedpratibha (intuition),samanyalaksanapratyaksa (a form of induction from perceived specifics to a universal), andjnanalaksanapratyaksa (a form of perception of prior processes and previous states of a 'topic of study' by observing its current state).[59] Further, some schools considered and refined rules of accepting uncertain knowledge fromPratyakṣa-pranama, so as to contrastnirnaya (definite judgment, conclusion) fromanadhyavasaya (indefinite judgment).[60]
Anumāna (अनुमान) means inference. It is described as reaching a new conclusion and truth from one or more observations and previous truths by applying reason.[61] Observing smoke and inferring fire is an example ofAnumana.[56] In all except one Hindu philosophies,[62] this is a valid and useful means to knowledge. The method of inference is explained by Indian texts as consisting of three parts:pratijna (hypothesis),hetu (a reason), anddrshtanta (examples).[63] The hypothesis must further be broken down into two parts, state the ancient Indian scholars:sadhya (that idea which needs to proven or disproven) andpaksha (the object on which thesadhya is predicated). The inference is conditionally true ifsapaksha (positive examples as evidence) are present, and ifvipaksha (negative examples as counter-evidence) are absent. For rigor, the Indian philosophies also state further epistemic steps. For example, they demandVyapti - the requirement that thehetu (reason) must necessarily and separately account for the inference in "all" cases, in bothsapaksha andvipaksha.[63][64] A conditionally proven hypothesis is called anigamana (conclusion).[65]
Śabda (शब्द) means relying on word, testimony of past or present reliable experts.[17][66] Hiriyanna explainsSabda-pramana as a concept which means reliable expert testimony. The schools which consider it epistemically valid suggest that a human being needs to know numerous facts, and with the limited time and energy available, he can learn only a fraction of those facts and truths directly.[67] He must cooperate with others to rapidly acquire and share knowledge and thereby enrich each other's lives. This means of gaining proper knowledge is either spoken or written, but throughSabda (words).[67] The reliability of the source is important, and legitimate knowledge can only come from theSabda ofVedas.[17][67] The disagreement between the schools has been on how to establish reliability. Some schools, such asCarvaka, state that this is never possible, and thereforeSabda is not a properpramana. Other schools debate means to establish reliability.[68]
The Samkhya system is based onSat-kārya-vāda or the theory of causation. According to Satkāryavāda, the effect is pre-existent in the cause. There is only an apparent or illusory change in the makeup of the cause and not a material one, when it becomes effect. Since, effects cannot come from nothing, the original cause or ground of everything is seen asPrakṛti.[69]
More specifically, Samkhya system follows theprakṛti-Parināma Vāda.Parināma denotes that the effect is a real transformation of the cause. The cause under consideration here isPrakṛti or more preciselyMoola-Prakṛti ("Primordial Matter"). The Samkhya system is therefore an exponent of an evolutionary theory of matter beginning with primordial matter. In evolution,Prakṛti is transformed and differentiated into multiplicity of objects. Evolution is followed by dissolution. In dissolution the physical existence, all the worldly objects mingle back intoPrakṛti, which now remains as the undifferentiated, primordial substance. This is how the cycles of evolution and dissolution follow each other. But this theory is very different from the modern theories of science in the sense thatPrakṛti evolves for each Jiva separately, giving individual bodies and minds to each and after liberation these elements ofPrakṛti merges into theMoola-Prakṛti. Another uniqueness of Sāmkhya is that not only physical entities but even mind, ego and intelligence are regarded as forms of Unconsciousness, quite distinct from pure consciousness.
Samkhya theorizes thatPrakṛti is the source of the perceived world of becoming. It is pure potentiality that evolves itself successively into twenty fourtattvas or principles. The evolution itself is possible becausePrakṛti is always in a state of tension among its constituent strands or gunas –sattva,rajas andtamas. In a state of equilibrium of three gunas, when the three together are one, "unmanifest"Prakṛti which is unknowable. Aguṇa is an entity that can change, either increase or decrease, therefore, pure consciousness is called nirguna or without any modification.
The evolution obeyscausality relationships, with primal Nature itself being the material cause of all physical creation. The cause and effect theory of Samkhya is called "Satkārya-vāda" ("theory of existent causes"), and holds that nothing can really be created from or destroyed into nothingness – all evolution is simply the transformation of primal Nature from one form to another.
Samkhyacosmology describes how life emerges in the universe; the relationship betweenPurusha andPrakṛti is crucial toPatanjali's yoga system. The strands of Samkhya thought can be traced back to theVedic speculation of creation. It is also frequently mentioned in theMahabharata andYogavasishta.
Larson (1969) discerns four basic periods in the development of Samkhya:[70]
8/9th c. BCE - 5th c. BCE: "ancient speculations," including speculative Vedic hymns and the oldest prose Upanishads
4th.c. BCE-1st c. CE: proto-Samkhya speculations, as found in the middle Upanishads, theBuddhacarita, the Bhagavad Gita, and the Mahabharata
1st-10/11th c. CE: classical Samkhya
15th-17th c.: renaissance of later Samkhya
Larson (1987) discerns three phases of development of the termsamkhya, relating to three different meanings:[71]
Vedic period and the Mauryan Empire,c. 1500 BCE until the 4th and 3rd c. BCE:[71] "relating to number, enumeration or calculation."[71] Intellectual inquiry was "frequently cast in the format of elaborate enumerations;[71] references tosamkhya do not denote integrated systems of thought.[22]
8th/7th c. BCE - first centuries CE:[22] as a masculine noun, referring to "someone who calculates, enumerates, or discriminates properly or correctly."[71] Proto-samkhya,[72] related to the early ascetic traditions,reflected in theMoksadharma section of the Mahabharata, the Bhagavad Gita, and the cosmological speculations of the Puranas.[22] The notion ofsamkhya becomes related to methods of reasoning that result in liberating knowledge (vidya,jnana,viveka) that end the cycle ofdukkha and rebirth.[73] During this period,samkhya becomes explicitly related to meditation, spiritual practices, and religious cosmology,[23] and is "primarily a methodology for attaining liberation and appears to allow for a great variety of philosophical formulations."[23] According to Larson, "Samkhya means in the Upanishads and the Epic simply the way of salvation by knowledge."[23] As such, it contains "psychological analyses of experience" that "become dominant motifs in Jain and Buddhist meditation contexts."[74] Typical Samkhya terminology and issues develop.[74] While yoga emphasizesasanas breathing, and ascetic practices,samkhya is concerned with intellectual analyses and proper discernment,[74] butsamkhya-reasonong is not really differentiated from yoga.[72] According to Van Buitenen, these ideas developed in the interaction between varioussramanas and ascetic groups.[75] Numerous ancient teachers are named in the various texts, including Kapila and Pancasikha.[76]
1st c. BCE - first centuries CE:[72] as a neuter term, referring to the beginning of a technical philosophical system.[77] Pre-karika-Samkhya (ca. 100 BCE – 200 CE).[78] This period ends withIshvara Krishna's (Iśvarakṛṣṇa, 350 CE)Samkhyakarika.[72] According to Larson, the shift of Samkhya from speculations to the normative conceptualization hints—but does not conclusively prove—that Samkhya may be the oldest of the Indian technical philosophical schools (e.g.Nyaya,Vaisheshika and Buddhist ontology), one that evolved over time and influenced the technical aspects of Buddhism andJainism.[79][note 2]
In the beginning this was Self alone, in the shape of a person (puruṣa). He looking around saw nothing but his Self (Atman). He first said, "This is I", therefore he became I by name.
The early, speculative phase took place in the first half of the first millennium BCE,[70] when ascetic spirituality and monastic (sramana andyati) traditions came into vogue in India, and ancient scholars combined "enumerated set[s] of principles" with "a methodology of reasoning that results in spiritual knowledge (vidya, jnana, viveka)."[73] These early non-Samkhya speculations and proto-Samkhya ideas are visible in earlier Hindu scriptures such as the Vedas,[note 3] earlyUpanishads such as theChandogya Upanishad,[73][note 4] and theBhagavad Gita.[87][70] However, these early speculations and proto-Samkhya ideas had not distilled and congealed into a distinct, complete philosophy.[88]
While some earlier scholars have argued for Upanishadic origins of the Samkhya-tradition,[note 4] and the Upanisads contain dualistic speculations which may have influenced proto-samkhya,[87][89] other scholars have noted the dissimilarities of Shamkhya with the Vedic tradition. As early as 1898,Richard Karl von Garbe, a German professor of philosophy and Indologist, wrote in 1898,
The origin of the Sankhya system appears in the proper light only when we understand that in those regions of India which were little influenced by Brahmanism [political connotation given by the Christian missionary] the first attempt had been made to solve the riddles of the world and of our existence merely by means of reason. For the Sankhya philosophy is, in its essence, not only atheistic but also inimical to the Veda'.[90]
Dandekar, similarly wrote in 1968, 'The origin of the Sankhya is to be traced to the pre-Vedic non-Aryan thought complex'.[91]Heinrich Zimmer states that Samkhya has non-Aryan origins.[21][note 1]
According to Ruzsa in 2006, "Sāṅkhya has a very long history. Its roots go deeper than textual traditions allow us to see,"[95] stating that "Sāṅkhya likely grew out of speculations rooted in cosmic dualism and introspective meditational practice."[95] The dualism is rooted in agricultural concepts of the union of the male sky-god and the female earth-goddess, the union of "the spiritual, immaterial, lordly, immobile fertilizer (represented as the Śiva-liṅgam, or phallus) and of the active, fertile, powerful but subservient material principle (Śakti or Power, often as the horrible Dark Lady, Kālī)."[95] In contrast,
The ascetic and meditative yoga practice, in contrast, aimed at overcoming the limitations of the natural body and achieving perfect stillness of the mind. A combination of these views may have resulted in the concept of thePuruṣa, the unchanging immaterial conscious essence, contrasted withPrakṛti, the material principle that produces not only the external world and the body but also the changing and externally determined aspects of the human mind (such as the intellect, ego, internal and external perceptual organs).[95]
According to Ruzsa,
Both the agrarian theology of Śiva-Śakti/Sky-Earth and the tradition of yoga (meditation) do not appear to be rooted in the Vedas. Not surprisingly, classical Sāṅkhya is remarkably independent of orthodox Brahmanic traditions, including the Vedas. Sāṅkhya is silent about the Vedas, about their guardians (the Brahmins) and for that matter about the whole caste system, and about the Vedic gods; and it is slightly unfavorable towards the animal sacrifices that characterized the ancient Vedic religion. But all our early sources for the history of Sāṅkhya belong to the Vedic tradition, and it is thus reasonable to suppose that we do not see in them the full development of the Sāṅkhya system, but rather occasional glimpses of its development as it gained gradual acceptance in the Brahmanic fold.[95]
Burley argues for anontegenetic or incremental development of Shamkya, instead of being established by one historical founder.[96] Burley states that India's religio-cultural heritage is complicated and likely experienced a non-linear development.[97] Samkhya is not necessarily non-Vedic nor pre-Vedic nor a 'reaction to Brahmanic hegemony', states Burley.[97] It is most plausibly in its origins a lineage that grew and evolved from a combination of ascetic traditions and Vedicguru (teacher) and disciples. Burley suggests the link between Samkhya and Yoga as likely the root of this evolutionary origin during the Vedic era of India.[97] According to Van Buitenen, various ideas on yoga and meditation developed in the interaction between varioussramanas and ascetic groups.[75]
The earliest mention ofdualism is in theRigveda, a text that was compiled in the late second millennium BCE.,[98] in various chapters.
Nasadiya Sukta (Hymn of non-Eternity, origin of universe):
There was neither non-existence nor existence then; Neither the realm of space, nor the sky which is beyond; What stirred? Where? In whose protection?
There was neither death nor immortality then; No distinguishing sign of night nor of day; That One breathed, windless, by its own impulse; Other than that there was nothing beyond.
Darkness there was at first, by darkness hidden; Without distinctive marks, this all was water; That which, becoming, by the void was covered; That One by force of heat came into being;
Who really knows? Who will here proclaim it? Whence was it produced? Whence is this creation? Gods came afterwards, with the creation of this universe. Who then knows whence it has arisen?
Whether God's will created it, or whether He was mute; Perhaps it formed itself, or perhaps it did not; Only He who is its overseer in highest heaven knows, Only He knows, or perhaps He does not know.
The hymn, asMandala 10 in general, is late within the Rigveda Samhita, and expresses thought more typical of laterVedantic philosophy.[100]
At a mythical level, dualism is found in theIndra–Vritra myth ofchapter 1.32 of the Rigveda.[101] Enumeration, the etymological root of the wordsamkhya, is found in numerous chapters of the Rigveda, such as 1.164, 10.90 and 10.129.[102] According to Larson, it is likely that in the oldest period these enumerations were occasionally also applied in the context of meditation themes and religious cosmology, such as in the hymns of 1.164 (Riddle Hymns) and 10.129 (Nasadiya Hymns).[103] However, these hymns present only the outline of ideas, not specific Samkhya theories and these theories developed in a much later period.[103]
The Riddle hymns of the Rigveda, famous for their numerous enumerations, structural language symmetry within the verses and the chapter, enigmatic word play withanagrams that symbolically portray parallelism in rituals and the cosmos, nature and the inner life of man.[104] This hymn includes enumeration (counting) as well as a series of dual concepts cited by early Upanishads . For example, the hymns 1.164.2 - 1.164-3 mention "seven" multiple times, which in the context of other chapters of Rigveda have been interpreted as referring to both seven priests at a ritual and seven constellations in the sky, the entire hymn is a riddle that paints a ritual as well as the sun, moon, earth, three seasons, the transitory nature of living beings, the passage of time and spirit.[104][105]
Seven to the one-wheeled chariot yoke the Courser; bearing seven names the single Courser draws it. Three-naved the wheel is, sound and undecaying, whereon are resting all these worlds of being. The seven [priests] who on the seven-wheeled car are mounted have horses, seven in tale, who draw them onward. Seven Sisters utter songs of praise together, in whom the names of the seven Cows are treasured. Who hath beheld him as he [Sun/Agni] sprang to being, seen how the boneless One [spirit] supports the bony [body]? Where is the blood of earth, the life, the spirit? Who will approach the one who knows, to ask this?
The chapter 1.164 asks a number of metaphysical questions, such as "what is the One in the form of the Unborn that created the six realms of the world?".[107][108] Dualistic philosophical speculations then follow in chapter 1.164 of the Rigveda, particularly in the well studied "allegory of two birds" hymn (1.164.20 - 1.164.22), a hymn that is referred to in theMundaka Upanishad and other texts .[104][109][110] The two birds in this hymn have been interpreted to mean various forms of dualism: "the sun and the moon", the "two seekers of different kinds of knowledge", and "the body and the atman".[111][112]
Two Birds with fair wings, knit with bonds of friendship, embrace the same tree. One of the twain eats the sweet fig; the other not eating keeps watch. Where those fine Birds hymn ceaselessly their portion of life eternal, and the sacred synods, There is the Universe's mighty Keeper, who, wise, hath entered into me the simple. The tree on which the fine Birds eat the sweetness, where they all rest and procreate their offspring, Upon its top they say the fig is sweetest, he who does not know the Father will not reach it.
The emphasis of duality between existence (sat) and non-existence (asat) in theNasadiya Sukta of theRigveda is similar to the vyakta–avyakta (manifest–unmanifest) polarity in Samkhya. The hymns about Puruṣa may also have had some influence on Samkhya.[113] The Samkhya notion of buddhi or mahat is similar to the notion ofhiranyagarbha, which appears in both theRigveda and theShvetashvatara Upanishad.[114]
Higher than the senses, stand the objects of senses. Higher than objects of senses, stands mind. Higher than mind, stands intellect. Higher than intellect, stands the great self. Higher than the great self, standsAvyaktam(unmenifested or indistinctive). Higher thanAvyaktam, stands Purusha. Higher than this, there is nothing. He is the final goal and the highest point. In all beings, dwells this Purusha, as Atman (essence), invisible, concealed. He is only seen by the keenest thought, by the sublest of those thinkers who see into the subtle.
The oldest of themajor Upanishads (c. 900–600 BCE) contain speculations along the lines of classical Samkhya philosophy.[87] The concept ofahamkara was traced back by Van Buitenen to chapters 1.2 and 1.4 of theBrihadaranyaka Upanishad and chapter 7.25 of theChāndogya Upaniṣad, where it is a "cosmic entity," and not a psychological notion.[87][114] Satkaryavada, the theory of causation in Samkhya, may in part be traced to the verses in sixth chapter which emphasize the primacy of sat (being) and describe creation from it. The idea that the three gunas or attributes influence creation is found in both Chandogya andShvetashvatara Upanishads.[117]
Yajnavalkya's exposition on the Self in theBrihadaranyaka Upanishad, and the dialogue betweenUddalaka Aruni and his son Svetaketu in theChandogya Upanishad represent a more developed notion of the essence of man (Atman) as "pure subjectivity - i.e., the knower who is himself unknowable, the seer who cannot be seen," and as "pure conscious," discovered by means of speculations, or enumerations.[118] According to Larson, "it seems quite likely that both the monistic trends in Indian thought and the dualistic samkhya could have developed out of these ancient speculations."[119] According to Larson, the enumeration oftattvas in Samkhya is also found inTaittiriya Upanishad,Aitareya Upanishad and Yajnavalkya–Maitri dialogue in the Brihadaranyaka Upanishad.[120]
Jainism was re-organised in 9th century BCE andBuddhism had developed in eastern India by the 5th century BCE. It is probable that these schools of thought and the earliest schools of Samkhya influenced each other.[121] According to Burely, there is no evidence that a systematic samkhya-philosophy existed prior to the founding of Buddhism and Jainism, sometime in the 5th or 4th century BCE.[122] A prominent similarity between Buddhism and Samkhya is the greater emphasis on suffering (dukkha) as the foundation for their respectivesoteriological theories, than other Indian philosophies.[121] However, suffering appears central to Samkhya in its later literature, which likely suggests a Buddhist influence.Eliade, however, presents the alternate theory that Samkhya and Buddhism developed their soteriological theories over time, benefiting from their mutual influence.[121]
Likewise, the Jain doctrine of plurality of individual souls (jiva) could have influenced the concept of multiple purushas in Samkhya. However Hermann Jacobi, an Indologist, thinks that there is little reason to assume that Samkhya notion of Purushas was solely dependent on the notion of jiva in Jainism. It is more likely, that Samkhya was moulded by many ancient theories of soul in various Vedic and non-Vedic schools.[121]
This declared to you is the Yoga of the wisdom of Samkhya. Hear, now, of the integrated wisdom with which, Partha, you will cast off the bonds of karma.
Samkhya andYoga are mentioned together for first time in chapter 6.13 of the Shvetashvatra Upanishad,[126] assamkhya-yoga-adhigamya (literally, "to be understood by proper reasoning and spiritual discipline").[127]
TheKatha Upanishad (5th-1st c. BCE) in verses 3.10–13 and 6.7–11 describes a concept of puruṣa, and other concepts also found in later Samkhya.[128] TheShvetashvatara Upanishad in chapter 6.13 describes samkhya with Yoga philosophy, and Bhagavad Gita in book 2 provides axiological implications of Samkhya, therewith providing textual evidence of samkhyan terminology and concepts.[126] Katha Upanishad conceives the Purusha (cosmic spirit, consciousness) as same as the individual soul (Ātman, Self).[128][129]
TheBhagavad Gita identifies Samkhya with understanding or knowledge.[130] The three gunas are also mentioned in the Gita, though they are not used in the same sense as in classical Samkhya.[131] The Gita integrates Samkhya thought with the devotion (bhakti) of theistic schools and the impersonalBrahman ofVedanta.[132]
TheMokshadharma chapter ofShanti Parva (Book of Peace) in the Mahabharata epic, composed between 400 BCE to 400 CE, explains Samkhya ideas along with other extant philosophies, and then lists numerous scholars in recognition of their philosophical contributions to various Indian traditions, and therein at least three Samkhya scholars can be recognized –Kapila,Asuri andPancasikha.[133][134] The 12th chapter of theBuddhacarita, a buddhist text composed in the early second century CE,[135] suggests Samkhya philosophical tools of reliable reasoning were well formed by about 5th century BCE.[133] According to Rusza, "The ancient BuddhistAśvaghoṣa (in hisBuddha-Carita) describesĀḷāra Kālāma, the teacher of the young Buddha (ca. 420 B.C.E.) as following an archaic form of Sāṅkhya."[95]
According to Ruzsa, about 2,000 years ago "Sāṅkhya became the representative philosophy of Hindu thought in Hindu circles",[95] influencing all strands of the Hindu tradition and Hindu texts.[95]
The earliest surviving authoritative text on classical Samkhya philosophy is theSamkhya Karika (c. 200 CE[139] or 350–450 CE[132]) of Īśvarakṛṣṇa.[132] There were probably other texts in early centuries CE, however none of them are available today.[140] Iśvarakṛṣṇa in hisKārikā describes a succession of the disciples from Kapila, throughĀsuri andPañcaśikha to himself. The text also refers to an earlier work of Samkhya philosophy called Ṣaṣṭitantra (science of sixty topics) which is now lost.[132] The text was imported and translated into Chinese about the middle of the 6th century CE.[141] The records ofAl Biruni, the Persian visitor to India in the early 11th century, suggests Samkhyakarika was an established and definitive text in India in his times.[142]
Samkhyakarika includes distilled statements on epistemology, metaphysics and soteriology of the Samkhya school. For example, the fourth to sixth verses of the text states it epistemic premises,[143]
Perception, inference and right affirmation are admitted to be threefold proof; for they (are by all acknowledged, and) comprise every mode of demonstration. It is from proof that belief of that which is to be proven results.
Perception is ascertainment of particular objects. Inference, which is of three sorts, premises an argument, and deduces that which is argued by it. Right affirmation is true revelation (Apta vacana andSruti, testimony of reliable source and the Vedas).
Sensible objects become known by perception; but it is by inference or reasoning that acquaintance with things transcending the senses is obtained. A truth which is neither to be directly perceived, nor to be inferred from reasoning, is deduced fromApta vacana andSruti.
The most popular commentary on the Samkhyakarika was the Gauḍapāda Bhāṣya attributed toGauḍapāda, the proponent ofAdvaita Vedanta school of philosophy. Other important commentaries on the karika wereYuktidīpīka (c. 6th century CE) andVācaspati’sSāṁkhyatattvakaumudī (c. 10th century CE).[144]
Between 1938 and 1967, two previously unknown manuscript editions ofYuktidipika (ca. 600–700 CE) were discovered and published.[145]Yuktidipika is an ancient review by an unknown author and has emerged as the most important commentary on theSamkhyakarika, itself an ancient key text of the Samkhya school.[146][88] This commentary as well as the reconstruction of pre-karika epistemology and Samkhya emanation text (containing cosmology-ontology) from the earliest Puranas andMokshadharma suggest that Samkhya as a technical philosophical system existed from about the last century BCE to the early centuries of the Common Era.Yuktidipika suggests that many more ancient scholars contributed to the origins of Samkhya in ancient India than were previously known and that Samkhya was a polemical philosophical system. However, almost nothing is preserved from the centuries when these ancient Samkhya scholars lived.[145]
The 13th century textSarvadarsanasangraha contains 16 chapters, each devoted to a separate school of Indian philosophy. The 13th chapter in this book contains a description of the Samkhya philosophy.[147]
TheSāṁkhyapravacana Sūtra (c. 14th century CE) renewed interest in Samkhya in the medieval era. It is considered the second most important work of Samkhya after the karika.[148] Commentaries on this text were written by Anirruddha (Sāṁkhyasūtravṛtti, c. 15th century CE), Vijñānabhikṣu (Sāṁkhyapravacanabhāṣya, c. 16th century CE), Mahādeva (vṛttisāra, c. 17th century CE) and Nāgeśa (Laghusāṁkhyasūtravṛtti).[149] In his introduction, the commentator Vijnana Bhiksu stated that only a sixteenth part of the original Samkhya Sastra remained, and that the rest had been lost to time.[150] While the commentary itself is no doubt medieval, the age of the underlying sutras is unknown and perhaps much older. According toSurendranath Dasgupta, scholar of Indian philosophy,Charaka Samhita, an ancient Indian medical treatise, also contains thoughts from an early Samkhya school.[151]
Although the Samkhya school considers theVedas a reliable source of knowledge, samkhya accepts the notion of higher selves or perfected beings but rejects the notion of God, according toPaul Deussen and other scholars,[152][153] although other scholars believe that Samkhya is as much theistic as theYoga school.[154][29] According toRajadhyaksha, classical Samkhya argues against the existence of God onmetaphysical grounds. Samkhya theorists argue that an unchanging God cannot be the source of an ever-changing world and that God was only a necessary metaphysical assumption demanded by circumstances.[155]
The oldest commentary on theSamkhakarika, the Yuktidīpikā, asserts the existence of God, stating:"We do not completely reject the particular power of the Lord, since he assumes a majestic body and so forth. Our intended meaning is just that there is no being who is different from prakrti and purusa and who is the instigator of these two, as you claim. Therefore, your view is refuted. The conjunction between prakrti and purusa is not instigated by another being.[29]
A medieval commentary of Samkhakarika such asSāṁkhyapravacana Sūtra in verse no. 1.92 directly states that existence of "Ishvara (God) is unproved". Hence there is no philosophical place for a creationist God in this system. It is also argued by commentators of this text that the existence of Ishvara cannot be proved and hence cannot be admitted to exist.[156] However, later in the text, the commentator Vijnana Bhiksu clarified that the subject of dispute between the Samkhyas and others was the existence of aneternal Isvara. Samkhya did accept the concept of anemergent Isvara previously absorbed into Prakriti.[157]
A key difference between the Samkhya and Yoga schools, state scholars,[153][158] is that the Yoga school accepts a 'personal, yet essentially inactive, deity' or 'personal god'.[159] However, Radhanath Phukan, in the introduction to his translation of theSamkhya Karika of Isvarakrsna has argued that commentators who see the unmanifested as non-conscious make the mistake of regarding Samkhya as atheistic, though Samkhya is equally as theistic as Yoga.[154] A majority of modern academic scholars are of view that the concept of Ishvara was incorporated into thenirishvara (atheistic) Samkhya viewpoint only after it became associated with theYoga, thePasupata and theBhagavata schools of philosophy. Others have traced the concept of the emergent Isvara accepted by Samkhya to as far back as the Rig Veda, where it was called Hiranyagarbha (the golden germ, golden egg).[160][161] This theistic Samkhya philosophy is described in theMahabharata, thePuranas and theBhagavad Gita.[162]
Chandradhar Sharma in 1960 affirmed that Samkhya in the beginning was based on the theistic absolute of Upanishads, but later on, under the influence of Jaina and Buddhist thought, it rejected theistic monism and was content with spiritualistic pluralism and atheistic realism. This also explains why some of the later Samkhya commentators, e.g.Vijnanabhiksu in the sixteenth century, tried to revive the earlier theism in Samkhya.[163]: 137
According to Sinha, the following arguments were given by Samkhya philosophers against the idea of an eternal, self-caused, creator God:[156]
If the existence ofkarma is assumed, the proposition of God as a moral governor of the universe is unnecessary. For, if God enforces the consequences of actions then he can do so without karma. If however, he is assumed to be within the law of karma, then karma itself would be the giver of consequences and there would be no need of a God.
Even if karma is denied, God still cannot be the enforcer of consequences. Because the motives of an enforcer God would be either egoistic or altruistic. Now, God's motives cannot be assumed to be altruistic because an altruistic God would not create a world so full of suffering. If his motives are assumed to be egoistic, then God must be thought to have desire, as agency or authority cannot be established in the absence of desire. However, assuming that God has desire would contradict God's eternal freedom which necessitates no compulsion in actions. Moreover, desire, according to Samkhya, is an attribute of prakṛti and cannot be thought to grow in God. The testimony of theVedas, according to Samkhya, also confirms this notion.
Despite arguments to the contrary, if God is still assumed to contain unfulfilled desires, this would cause him to suffer pain and other similar human experiences. Such a worldly God would be no better than Samkhya's notion of higher self.
Furthermore, there is no proof of the existence of God. He is not the object of perception, there exists no general proposition that can prove him by inference and the testimony of the Vedas speak of prakṛti as the origin of the world, not God.
Therefore, Samkhya maintained that the various cosmological, ontological and teleological arguments could not prove God.
TheVaisheshika atomism,Nyaya epistemology may all have roots in the early Samkhya school of thought; but these schools likely developed in parallel with an evolving Samkhya tradition, as sibling intellectual movements.[164]
Yoga is closely related to Samkhya in its philosophical foundations.
The Yoga school derives itsontology andepistemology from Samkhya and adds to it the concept ofIsvara.[165] However, scholarly opinion on the actual relationship between Yoga and Samkhya is divided. WhileJakob Wilhelm Hauer andGeorg Feuerstein believe that Yoga was a tradition common to many Indian schools and its association with Samkhya was artificially foisted upon it by commentators such asVyasa.Johannes Bronkhorst and Eric Frauwallner think that Yoga never had a philosophical system separate from Samkhya. Bronkhorst further adds that the first mention of Yoga as a separate school of thought is no earlier thanŚankara's (c. 788–820 CE)[166] Brahmasūtrabhaśya.[167]
The dualistic metaphysics of variousTantric traditions illustrates the strong influence of Samkhya on Tantra.Shaiva Siddhanta was identical to Samkhya in its philosophical approach, barring the addition of a transcendent theistic reality.[168] Knut A. Jacobsen, Professor of Religious Studies, notes the influence of Samkhya onSrivaishnavism. According to him, this Tantric system borrows the abstract dualism of Samkhya and modifies it into a personified male–female dualism ofVishnu andSri Lakshmi.[169] Dasgupta speculates that the Tantric image of a wildKali standing on a slumberingShiva was inspired from the Samkhyan conception of prakṛti as a dynamic agent and Purusha as a passive witness. However, Samkhya and Tantra differed in their view on liberation. While Tantra sought to unite the male and female ontological realities, Samkhya held a withdrawal of consciousness from matter as the ultimate goal.[170]
According to Bagchi, the Samkhya Karika (in karika 70) identifies Sāmkhya as aTantra,[171] and its philosophy was one of the main influences both on the rise of theTantras as a body of literature, as well as Tantrasadhana.[172]
The Advaita Vedanta philosopherAdi Shankara calledSamkhya as the 'principal opponent' (pradhana-malla) of the Vedanta. He criticized theSamkhya view that the cause of the universe is the unintelligentPrakriti (Pradhan). According to Shankara, the Intelligent Brahman only can be such a cause.[163]: 242–244 He consideredSamkhya philosophy as propounded in Samkhyakarika to be inconsistent with the teachings in the Vedas, and considered the dualism in Samkhya to be non-Vedic.[173] In contrast, ancient Samkhya philosophers in India claimed Vedic authority for their views.[174]
^abZimmer: "[Jainism] does not derive from Brahman-Aryan sources, but reflects the cosmology and anthropology of a much older pre-Aryan upper class of northeastern India - being rooted in the same subsoil of archaic metaphysical speculation as Yoga, Sankhya, and Buddhism, the other non-Vedic Indian systems."[92]
^With the publication of previously unknown editions ofYuktidipika about mid 20th century, Larson[80] has suggested what he calls as "a tempting hypothesis", but uncertain, that Samkhya tradition may be the oldest of the Indian technical philosophical schools (Nyaya, Vaisheshika).[80]
^Early speculations such as Rg Veda 1.164, 10.90 and 10.129; seeLarson (2014, p. 5).
^abOlder authors have noted the references tosamkhya in the Upanishads.Surendranath Dasgupta stated in 1922 that Samkhya can be traced to Upanishads such asKatha Upanishad,Shvetashvatara Upanishad andMaitrayaniya Upanishad, and that the 'extant Samkhya' is a system that unites the doctrine of permanence of the Upanishads with the doctrine of momentariness of Buddhism and the doctrine of relativism of Jainism.[83] Arthur Keith in 1925 said, '[That] Samkhya owes its origin to the Vedic-Upanisadic-epic heritage is quite evident',[84] and 'Samkhya is most naturally derived out of the speculations in the Vedas, Brahmanas and the Upanishads'.[85] Johnston in 1937 analyzed then available Hindu and Buddhist texts for the origins of Samkhya and wrote, '[T]he origin lay in the analysis of the individual undertaken in theBrahmanas and earliest Upanishads, at first with a view to assuring the efficacy of the sacrificial rites and later in order to discover the meaning of salvation in the religious sense and the methods of attaining it. Here – inKaushitaki Upanishad andChandogya Upanishad – the germs are to be found (of) two of the main ideas of classical Samkhya'.[86]
^"Samkhya",American Heritage Dictionary of the English Language, Fifth Edition (2011), Quote: "Samkhya is a system of Hindu philosophy based on a dualism involving the ultimate principles of soul and matter."
^"Samkhya",Webster's College Dictionary (2010), Random House,ISBN978-0375407413, Quote: "Samkhya is a system of Hindu philosophy stressing the reality and duality of spirit and matter."
^abcde* Eliott Deutsche (2000), inPhilosophy of Religion: Indian Philosophy, Volume 4 (Editor: Roy Perrett), Routledge,ISBN978-0815336112, pages 245–248.
John A. Grimes, A Concise Dictionary of Indian Philosophy: Sanskrit Terms Defined in English, State University of New York Press,ISBN978-0791430675, page 238.
^John A. Grimes,A Concise Dictionary of Indian Philosophy: Sanskrit Terms Defined in English, State University of New York Press,ISBN978-0791430675, page 238.
^Mikel Burley (2012),Classical Samkhya and Yoga – An Indian Metaphysics of Experience, Routledge,ISBN978-0415648875, pages 43–46.
^David Kalupahana (1995),Ethics in Early Buddhism, University of Hawaii Press,ISBN978-0824817022, page 8, Quote: The rational argument is identified with the method ofSamkhya, a rationalist school, upholding the view that "nothing comes out of nothing" or that "being cannot be non-being."
^Gerald James Larson (2011),Classical Sāṃkhya: An Interpretation of Its History and Meaning, Motilal Banarsidass,ISBN978-8120805033, page 273
^Original Sanskrit:Samkhya karika Compiled and indexed by Ferenc Ruzsa (2015), Sanskrit Documents Archives; Samkhya karika by Iswara Krishna, Henry Colebrooke (Translator), Oxford University Press, page 169
^abMM Kamal (1998), The Epistemology of the Carvaka Philosophy, Journal of Indian and Buddhist Studies, 46(2): 13-16
^B Matilal (1992), Perception: An Essay in Indian Theories of Knowledge, Oxford University Press,ISBN978-0198239765
^abKarl Potter (1977), "Meaning and Truth," inEncyclopedia of Indian Philosophies, Volume 2, Princeton University Press, Reprinted in 1995 by Motilal Banarsidass,ISBN81-208-0309-4, pages 160-168
^Karl Potter (1977), Meaning and Truth, in Encyclopedia of Indian Philosophies, Volume 2, Princeton University Press, Reprinted in 1995 by Motilal Banarsidass,ISBN81-208-0309-4, pages 168-169
^Karl Potter (1977), "Meaning and Truth," inEncyclopedia of Indian Philosophies, Volume 2, Princeton University Press, Reprinted in 1995 by Motilal Banarsidass,ISBN81-208-0309-4, pages 170-172
^W Halbfass (1991), Tradition and Reflection, State University of New York Press,ISBN0-7914-0362-9, page 26-27
^Gerald Larson (2011), Classical Sāṃkhya: An Interpretation of Its History and Meaning, Motilal Banarsidass,ISBN978-8120805033, pages 31-32
^Gerald Larson (2011), Classical Sāṃkhya: An Interpretation of Its History and Meaning, Motilal Banarsidass,ISBN978-8120805033, page 29
^EH Johnston (1937), Early Samkhya: An Essay on its Historical Development according to the Texts, The Journal of the Royal Asiatic Society, Volume XV, pages 80-81
^Richard Garbe (1892).Aniruddha's Commentary and the original parts of Vedantin Mahadeva's commentary on the Sankhya Sutras Translated, with an introduction to the age and origin of the Sankhya system. pp. xx–xxi.
^"Although, no doubt, of high antiquity, the hymn appears to be less of a primary than of a secondary origin, being in fact a controversial composition levelled especially against theSāṃkhya theory." Ravi Prakash Arya and K. L. Joshi.Ṛgveda Saṃhitā: Sanskrit Text, English Translation, Notes & Index of Verses. (Parimal Publications: Delhi, 2001)ISBN81-7110-138-7 (Set of four volumes). Parimal Sanskrit Series No. 45; 2003 reprint: 81-7020-070-9, Volume 4, p. 519.
^abcStephanie Jamison and Joel Brereton (2014), The Rigveda, Oxford University Press,ISBN978-0199370184, pages 349-359
^William Mahony (1997), The Artful Universe: An Introduction to the Vedic Religious Imagination, State University of New York Press,ISBN978-0791435809, pages 245-250
^GJ Larson, RS Bhattacharya and K Potter (2014), The Encyclopedia of Indian Philosophies, Volume 4, Princeton University Press,ISBN978-0691604411, pages 2-8, 114-116
^GJ Larson, RS Bhattacharya and K Potter (2014), The Encyclopedia of Indian Philosophies, Volume 4, Princeton University Press,ISBN978-0691604411, pages 6-7, 74-88, 113-122, 315-318
^GJ Larson, RS Bhattacharya and K Potter (2014),The Encyclopedia of Indian Philosophies, Volume 4, Princeton University Press,ISBN978-0691604411, pages 6–7
^abcGerald James Larson and Ram Shankar Bhattacharya, The Encyclopedia of Indian Philosophies, Volume 4, Princeton University Press,ISBN978-0691604411, pages 107-109
^Mike Burley (2012), Classical Samkhya and Yoga - An Indian Metaphysics of Experience, Routledge,ISBN978-0415648875, page 39
^abLloyd Pflueger, Person Purity and Power in Yogasutra, in Theory and Practice of Yoga (Editor: Knut Jacobsen), Motilal Banarsidass,ISBN978-8120832329, pages 38-39
^abRadhanath Phukan,Samkhya Karika of Isvarakrsna (Calcutta: Firma K. L. Mukhopadhyay, 1960), pp.36-40
Karmarkar, A.P. (1962),Religion and Philosophy of Epics in S. Radhakrishnan ed. The Cultural Heritage of India, Vol.II, Calcutta: The Ramakrishna Mission Institute of Culture,ISBN81-85843-03-1
Larson, G.J. (2014), "Introduction to the Philosophy of Samkhya", in Larson, G.J.; Bhattacharya, R.S. (eds.),The Encyclopedia of Indian Philosophies, Volume 4, Princeton University Press,ISBN978-0691604411
Larson, G.J.; Bhattacharya, R.S.; Potter, K. (2014),The Encyclopedia of Indian Philosophies, Volume 4, Princeton University Press,ISBN978-0691604411