Hearken unto me, my people; and give ear unto me, O my nation: for a law shall proceed from me, and I will make my judgment to rest for a light of the people.
Hearken unto me, my people; and give ear unto me, O my nation - the Jews. This reading `amiy (H5971) uwl'uwmiy (H3816), is better than that of Gesenius, who takes the -iy termination to be the old one for the plural, not the possessive pronoun suffix. 'O peoples ... nations'-namely, the Gentiles. The Jews are called on to hear and rejoice in the extension of the true religion to the nations; because, at the flint preaching of the Gospel, as in the final age to come, it was from Jerusalem that the Gospel law was and is to go forth (Isaiah 2:3).
A law shall proceed from me, and I will make any judgment to rest - the Gospel dispensation and institutions (Isaiah 42:1, "my servant ... shall belong forth judgment to the Gentiles").
Make ... to rest - establish firmly; found.
For a light of the people - (Isaiah 42:6).