John Gill Commentary Isaiah 59:21

"And as for me, this is my covenant with them, saith Jehovah: 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 Jehovah, from henceforth and for ever." — Isaiah 59:21 (ASV)

As for me, this is my covenant with them, says the Lord
Which shall be manifested and made good to them that repent of their sins, and believe in Christ, and to whom its particular blessing, the forgiveness of their sins, shall be applied; see (Romans 11:27).

My Spirit which is upon you, and my words which I have put in your mouth;
the Spirit of God, with his gifts and graces, which were upon Christ the Redeemer without measure; and the doctrines he received from his divine Father to teach others, and which he gave to his apostles; the same Spirit which in measure was put upon them, and the same truths which were delivered to them.

Shall not depart out of your mouth, nor out of the mouth of your seed, nor out of the mouth of your seed's seed, says the Lord, from henceforth and for ever;
that is, shall always continue with the church and her spiritual seed, such as are born in her, and brought up by her, throughout all successive ages, and to the end of time; and it may be observed, that after the conversion of the Jews, to which this prophecy has a special regard, they shall no more apostatize; the Spirit of the Lord shall not depart from them; and the Gospel shall always be professed by them.

And it may be further observed, that the Spirit and the word go together; and that the latter is only effectual as accompanied with the former, and is a proof of the perseverance of the church of God, and of all such who have the Spirit and grace of God. Christ will always have a church, and that church a seed, in which the Spirit and word will always remain. The grace of the Spirit, in the hearts of God's people, never removes from them; nor his Gospel from such, in whose hearts it works effectively.

The Targum interprets this of the words of prophecy; and the Talmud ^F15 of the law not departing from the disciples of wise men; but it is best to understand it of the Gospel not departing from the disciples of Christ, and the seed of the church.

---

FOOTNOTES:

• F15: T. Bab. Bava Metzia, fol. 85. 1.