Genesis 17:7. And I will establish my covenant — Not to be altered or revoked; not with thee only, then it would die with thee; but with thy seed after thee — Especially thy spiritual seed. It is everlasting in the evangelical meaning of it, from everlasting in the counsels of it, and to everlasting in the consequences of it. This is a covenant of exceeding great and precious promises. Here are two which indeed are all-sufficient: one is, that God would be a God to him and to his seed. All the privileges of the covenant, all its joys and all its hopes, are summed up in this. A man needs desire no more than this to make him happy. What God is himself, that he will be to his people: wisdom to guide and counsel them, power to protect and support them, goodness to supply and comfort them; what faithful worshippers can expect from the God they serve, believers shall find in God as theirs. This is enough, yet not all: The other is, —

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.Next, the spiritual part of the covenant comes into view. "To be a God unto thee, and to thy seed after thee." Here we find God, in the progress of human development, for the third time laying the foundations of a covenant of grace with man. He dealt with Adam and with Noah, and now be deals with Abraham. "A perpetual covenant." This covenant will not fail, since God has originated it, notwithstanding the moral instability of man. Though we cannot as yet see the possibility of fulfilling the condition on man's side, yet we may be assured that what God purposes will somehow be accomplished. The seed of Abraham will eventually embrace the whole human family in fellowship with God.5. but thy name shall be Abraham—In Eastern countries a change of name is an advertisement of some new circumstance in the history, rank, or religion of the individual who bears it. The change is made variously, by the old name being entirely dropped for the new, or by conjoining the new with the old; or sometimes only a few letters are inserted, so that the altered form may express the difference in the owner's state or prospects. It is surprising how soon a new name is known and its import spread through the country. In dealing with Abraham and Sarai, God was pleased to adapt His procedure to the ideas and customs of the country and age. Instead of Abram, "a high father," he was to be called Abraham, "father of a multitude of nations" (see Re 2:17). i.e. Whatsoever I am or have, all that shall be thine, and shall be employed for thy protection, consolation, and salvation. This phrase contains in it the confluence of all blessing, temporal, spiritual, and eternal. See Leviticus 26:12 Psalm 33:12 144:15 Jeremiah 31:33.

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.

And I will establish my covenant between me and thee and thy seed after thee in their generations for an everlasting covenant, to be a God unto thee, and to thy seed after thee.