Sing unto the Lord He continues his exhortation, showing what is the feeling from which this thanksgiving ought to proceed; for he shows that it is our duty to proclaim the goodness of God to every nation. While we exhort and encourage others, we must not at the same time sit down in indolence, but it is proper that we set an example before others; for nothing can be more absurd than to see lazy and slothful men who are exciting other men to praise God. For he hath done glorious things. When he asserts that God hath done gloriously, he means that there is abundant ground for singing. The Lord does not wish that his praises should be proclaimed without any reason, but holds out a very rich and very abundant subject of praise, when he frees his people from very hard bondage. We have said that this song is not limited to a short period, but, on the contrary, extends to the whole of Christ's reign. This work therefore is truly glorious, that God sent his Son to reconcile us to himself, (John 3:16, 17,) and to destroy the dominion of death and the devil. (Hebrews 2:14.) If, therefore, we consider the work of our deliverance as we ought to do, we shall have very abundant ground for praising God. And this hath been made known through all the earth. When he says that this hath been made known, he glances at the calling of the Gentiles, and confirms what has been already stated, that the work is such as ought not to be concealed in a corner, but to be everywhere proclaimed.

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,.... Psalm, 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, &c.--alluding to Exodus 15:21.