Commentaries
42:5-12 The work of redemption brings back man to the obedience he owes to God as his Maker. Christ is the light of the world. And by his grace he opens the understandings Satan has blinded, and sets at liberty from the bondage of sin. The Lord has supported his church. And now he makes new promises, which shall as certainly be fulfilled as the old ones were. When the Gentiles are brought into the church, he is glorified in them and by them. Let us give to God those things which are his, taking heed that we do not serve the creature more than the Creator.
10. new song—such as has never before been sung, called for by a new manifestation of God's grace, to express which no hymn for former mercies would be appropriate. The new song shall be sung when the Lord shall reign in Jerusalem, and all "nations shall flow unto it" (Isa 2:2; 26:1; Re 5:9; 14:3).
ye that go down to the sea—whose conversion will be the means of diffusing the Gospel to distant lands.
all … therein—all the living creatures that fill the sea (Ps 96:11) [Maurer]. Or, all sailors and voyagers [Gesenius]. But these were already mentioned in the previous clause: there he called on all who go upon the sea; in this clause all animals in the sea; so in Isa 42:11, he calls on the inanimate wilderness to lift up its voice. External nature shall be so renovated as to be in unison with the moral renovation.