20 And the Redeemer shall come to Zion, and unto them that turn from transgression in Jacob, saith the Lord.
21 As for Me, this is My covenant with them, saith the Lord; My spirit that is upon thee, and My words which I have put in thy mouth, shall not depart out of thy mouth, nor out of the mouth of thy seed, nor out of the mouth of thy seed’s seed, saith the Lord, from henceforth and for ever.
Repentance must come before blessing. No one who refuses to turn from his sin will be saved; he will not be delivered from the wrath to come until he has repented and turned to God.
In verse 20, God speaks directly and not through the prophet. At this point, Isaiah becomes the recorder of God’s Word. He promises, once Israel has truly repented and turned to God, that His Spirit will be upon the people, and that His Word will be in their mouths; that is, they will love His Word again, and will speak of it, and teach and preach it. Not only that, but the same promise is made to their children, and their children’s children, for all eternity.