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Exodus 15:1,21
Then sang Moses and the children of Israel this song unto the LORD, and spake, saying, I will sing unto the LORD, for he hath triumphed gloriously: the horse and his rider hath he thrown into the sea…

Psalm 68:32-35
Sing unto God, ye kingdoms of the earth; O sing praises unto the Lord; Selah: …

Psalm 98:1
A Psalm. O sing unto the LORD a new song; for he hath done marvellous things: his right hand, and his holy arm, hath gotten him the victory.

this is known

Isaiah 40:9
O Zion, that bringest good tidings, get thee up into the high mountain; O Jerusalem, that bringest good tidings, lift up thy voice with strength; liftit up, be not afraid; say unto the cities of Judah, Behold your God!

Psalm 72:19
And blessedbe his glorious name for ever: and let the whole earth be filledwith his glory; Amen, and Amen.

Habakkuk 2:14
For the earth shall be filled with the knowledge of the glory of the LORD, as the waters cover the sea.

for He has done glorious things
The "glorious things" refer to the mighty acts of God, particularly His deliverance and salvation of His people. In the context of Isaiah, this can be seen as a reference to the deliverance from Assyrian oppression and a future hope of ultimate salvation through the Messiah. The phrase echoes the song of Moses inExodus 15, where the Israelites praised God for their deliverance from Egypt. It also points forward to the ultimate act of salvation through Jesus Christ, whose life, death, and resurrection are the most glorious acts of God.

Let this be known in all the earth
This phrase emphasizes the universal scope of God's salvation and the call to proclaim His deeds to all nations. It reflects the missional aspect of Israel's calling to be a light to the Gentiles, as seen inIsaiah 49:6. The proclamation of God's works is not limited to Israel but is intended for all the earth, foreshadowing the Great Commission inMatthew 28:19-20, where Jesus commands His followers to make disciples of all nations. This global perspective underscores the inclusivity of God's plan of redemption.

“Sing to the LORD” (Isaiah 12:5) is an open invitation—really, a command—to lift our voices in worship.

• This isn’t optional praise; it’s the natural response of people who have tasted God’s salvation (Isaiah 12:2).

• Scripture consistently portrays singing as a way God’s people declare His worth (Psalm 96:1–2;Psalm 100:1–2;Ephesians 5:19).

• Notice it’s directed to “the LORD,” the covenant name Yahweh—reminding us He is the faithful God who keeps every promise (Exodus 34:6).

• Singing unites head and heart: truth about God moves from knowledge to heartfelt celebration (Colossians 3:16).

We worship because He “has done glorious things.” Our praise rests on concrete actions, not vague feelings.

• Think back to Israel’s history: the Red Sea deliverance (Exodus 15:1–2) or Jordan’s parting (Joshua 4:23–24)—undeniable, glorious acts.

• Isaiah’s audience could also look forward: the Messiah’s victory foretold inIsaiah 53 would be the ultimate “glorious thing,” fulfilled in Christ’s death and resurrection (1 Corinthians 15:3–4).

• Personal experience counts, too. Every answered prayer, every moment of provision, every conversion story echoesPsalm 40:3: “He put a new song in my mouth.”

• Because His works are real, our praise must be equally real, joyful, and audible (Psalm 145:4–6).

Praise isn’t meant to stay private. God’s glory is news the whole planet needs.

• Isaiah’s global vision matches God’s promise to Abraham that “all nations” would be blessed (Genesis 12:3).

•Psalm 96:3 urges, “Declare His glory among the nations, His wonderful deeds among all peoples.” The same heartbeat pulses through the Great Commission (Matthew 28:18–20) andActs 1:8.

• Practical outflow:

– Share testimonies of what God has done—at home, work, school.

– Support and engage in missions, whether by going, sending, or praying (Romans 10:14–15).

– Let everyday conversations, social media, and community involvement reflect His greatness (1 Peter 2:9).

• The earth will one day be “filled with the knowledge of the glory of the LORD as the waters cover the sea” (Habakkuk 2:14). Our witness hastens that day.

Isaiah 12:5 calls us to sing exuberantly to the LORD because His track record of glorious deeds demands it, and then to carry that song beyond sanctuary walls so every corner of the earth hears. Worship, gratitude, and mission flow together: we praise, remember, and proclaim—until the whole world joins the chorus.