Sing unto the Lord - This is the same expression which occurs in the song of Moses Exodus 15:21. Isaiah evidently had that in his eye.

He hath done excellent things - Things that are exalted (גאות gê'ûth); that are worthy to be celebrated, and had in remembrance; things that are majestic, grand, and wonderful.

This is known in all the earth - Or, more properly, 'Let this be known in all the earth.' It is worthy of being celebrated everywhere. It should be sounded abroad through all lands. This expresses the sincere desire of all who are redeemed, and who are made sensible of the goodness and mercy of God the Saviour. The instinctive and the unceasing wish is, that the wonders of the plan of redeeming mercy should be everywhere known among the nations, and that all flesh should see the salvation of our God.

Sing unto the Lord,.... Psalms, hymns, and spiritual songs, vocally and together, as Gospel churches, to the glory of God; or "sing the Lord" (u), let him be the subject matter of the song, as in Isaiah 12:2 sing how great and good he is; sing what he is in himself, and what he is to others:

for he hath done excellent things; he hath wrought out an excellent salvation, which excels all others, being of a spiritual nature, complete and everlasting: it is emphatically a great one, in which God is glorified in all his perfections, and which issues in the eternal glory and happiness of his people. He has brought in an excellent righteousness, a righteousness that excels any righteousness of the creature, men or angels; it being the righteousness of God, a perfect, pure, and spotless one, which serves for many, even all his spiritual seed, and is everlasting: he has offered up an excellent sacrifice, a sacrifice that excels all that were offered up under the law; in the matter, which is himself; in the use and efficacy of it, to atone for sin, and take it away; in the continuance of that efficacy, and in its acceptableness unto God: and he has obtained an excellent victory over all his and his people's enemies, sin, Satan, the world, and death, and made them sharers in his conquests; reference seems to be had to Exodus 15:1,

this is known in all the earth; that such a salvation is finished; such a righteousness is brought in; that peace, pardon, and atonement, are procured, and all enemies are conquered; for the Gospel publishing all this has been sent into all the world, and will be more fully preached throughout it in the latter day.

(u) "canite Jehovam", Cocceius; Sept.

Sing unto the LORD; for he hath done excellent things: this is known in all the earth.

5. Sing, &c.-alluding to Ex 15:21.

12:10-16 When the gospel should be publicly preached, the Gentiles would seek Christ Jesus as their Lord and Saviour, and find rest of soul. When God's time is come for the deliverance of his people, mountains of opposition shall become plains before him. God can soon turn gloomy days into glorious ones. And while we expect the Lord to gather his ancient people, and bring them home to his church, also to bring in the fulness of the Gentiles, when all will be united in holy love, let us tread the highway of holiness he has made for his redeemed. Let us wait for the mercy of our Lord Jesus Christ unto eternal life, looking to him to prepare our way through death, that river which separates this world from the eternal world.