Verse 7. - And I will establish my covenant between me and thee and thy seed after thee in their generations for an everlasting covenant, - literally, for a covenant of eternity (vide Genesis 9:16) - to be a God unto thee, and to thy seed after thee. Literally, to be for Elohim; a formula comprehending all saving benefits; a clear indication of the spiritual character of the Abrahamic covenant (cf. Genesis 26:24; Genesis 28:13; Hebrews 11:16).

17:7-14 The covenant of grace is from everlasting in the counsels of it, and to everlasting in the consequences of it. The token of the covenant was circumcision. It is here said to be the covenant which Abraham and his seed must keep. Those who will have the Lord to be to them a God, must resolve to be to him a people. Not only Abraham and Isaac, and his posterity by Isaac, were to be circumcised, but also Ishmael and the bond-servants. It sealed not only the covenant of the land of Canaan to Isaac's posterity, but of heaven, through Christ, to the whole church of God. The outward sign is for the visible church; the inward seal of the Spirit is peculiar to those whom God knows to be believers, and he alone can know them. The religious observance of this institution was required, under a very severe penalty. It is dangerous to make light of Divine institutions, and to live in the neglect of them. The covenant in question was one that involved great blessings for the world in all future ages. Even the blessedness of Abraham himself, and all the rewards conferred upon him, were for Christ's sake. Abraham was justified, as we have seen, not by his own righteousness, but by faith in the promised Messiah.And I will establish my covenant between me and thee,.... Not only renew it, but confirm it by the following token of circumcision:

and thy seed after thee, in their generation; such blessings in it as belonged to his natural seed, as such he confirmed to them, to be enjoyed by them in successive ages; and such as belonged to his spiritual seed, to them also, as they should be raised up in future times in one place and another:

for an everlasting covenant; to his natural seed, as long as they should continue in the true worship of God; and in their own land; or until the Messiah came, in whom the covenant of circumcision had its accomplishment, and was at an end; and to all his spiritual seed, with respect to the spiritual blessings of it, which are everlasting, and are never taken away, or become void:

to be a God unto thee, and to thy seed after thee; to his natural seed, as the God of nature and providence, communicating the good things of life unto them; protecting, preserving, and continuing them in the land he gave them, and in the possessive of all the good things in it, so long as they were obedient to him as their King and their God; and to his spiritual seed, as the God of all grace, supplying them with grace here, and bestowing upon them glory hereafter.