Isaiah 59:21

This is my covenant with them "This is the covenant which I make with them" - For אותם otham, them, twenty-four MSS., (four ancient), and nine editions have אתם ittam, with them. My Spirit that is upon thee - This seems to be an address to the Messiah; Kimchi says it is to the prophet, informing him that the spirit of prophecy should be given to all Israelites in the days of the Messiah, as it was then given to him, i.e., to the prophet. And my words which I have put in thy mouth - Whatsoever Jesus spoke was the word and mind of God himself; and must, as such, be implicitly received. Nor out of the mouth of thy seed - The same doctrines which Jesus preached, all his faithful ministers preach; and his seed - genuine Christians, who are all born of God, believe; and they shall continue, and the doctrines remain in the seed's seed through all generations - for ever and ever. This is God's covenant, ordered in all things and sure.

covenant with them . . . thee--The covenant is with Christ, and with them only as united to Him (Heb 2:13). Jehovah addresses Messiah the representative and ideal Israel. The literal and spiritual Israel are His seed, to whom the promise is to be fulfilled (Psa 22:30). spirit . . . not depart . . . for ever-- (Jer 31:31-37; Mat 28:20). An ode of congratulation to Zion on her restoration at the Lord's second advent to her true position as the mother church from which the Gospel is to be diffused to the whole Gentile world; the first promulgation of the Gospel among the Gentiles, beginning at Jerusalem [Luk 24:47], is an earnest of this. The language is too glorious to apply to anything that as yet has happened. Next: Isaiah Chapter 60

As for me, this is my covenant with them, saith the Lord,.... Which shall be manifested and made good to them that repent of their sins, and, believe in Christ; and to whom the particular blessing of it shall be applied, the forgiveness of their sins; see Rom 11:27, my Spirit which is upon thee, and my words which I have put in thy 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 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; 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 will, 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 effectually. The Targum interprets this of the words of prophecy; and the Talmud (o) of…

Jehovah, having thus come as a Redeemer to His people, who have hitherto been lying under the curse, makes an everlasting covenant with them. "And I, this is my covenant with them, saith Jehovah: My Spirit which is upon thee, and my word which I have put in thy mouth, shall not depart out of thy mouth, and out of the mouth of thy seed, and out of the mouth of thy seed's seed, saith Jehovah, from henceforth and for ever." In the words, "And I, this is my covenant with them," we have a renewal of the words of God to Abram in Gen 17:4, "As for me, behold, my covenant is with thee." Instead of אתּם we have in the same sense אתם (not אותם, as in Isa 54:15); we find this very frequently in Jeremiah. The following prophecy is addressed to Israel, the "servant of Jehovah," which has been hitherto partially faithful and partially unfaithful, but which has now returned to fidelity, viz., the "remnant of Israel," which has been rescued through the medium of a general judgment upon the nations, and to which the great body of all who fear God from east to west attach themselves. This church of the new covenant has the Spirit of God over it, for it comes down upon it from above; and the comforting saving words of God are not only the blessed treasure of its heart, but the confession of its mouth which spreads salvation all around. The words intended are those which prove, according to Isa 51:16, the seeds of the new heaven and the new earth. The church of the last days, endowed with the Spirit of God, and never again forsaking its calling, carries them as the evangelist of God in her apostolic mouth. The subject of the following prophecy is the new Jerusalem, the glorious centre of this holy church.

In this chapter we have sin appearing exceedingly sinful, and grace appearing exceedingly gracious; and, as what is here said of the sinner's sin (Isa 59:7, Isa 59:8) is applied to the general corruption of mankind (Rom 3:15), so what is here said of a Redeemer (Isa 59:20) is applied to Christ, Rom 11:26. I. It is here charged upon this people that they had themselves stopped the current of God's favours to them, and the particular sins are specified which kept good things from them (Isa 59:1-8). II. It is here charged upon them that they had themselves procured the judgments of God upon them, and they are told both what the judgments were which they had brought upon their own heads (Isa 59:9-11) and what the sins were which provoked God to send those judgments (Isa 59:12-15). III. It is here promised that, notwithstanding this, God would work deliverance for them, purely for his own name's sake (Isa 59:16-19), and would reserve mercy in store for them and entail it upon them (Isa 59:20, Isa 59:21).

59:21 The members of the new community have the Spirit, and they know and practice God’s word (see also Ezek 36:24-28). The Lord promises to regenerate the children by his Spirit and bring them into the covenant of obedience and love for the Lord (Joel 2:28; Acts 2:39).