Genesis 17:7

An everlasting covenant - ברית עולם berith olam. See note on Genesis 13:15. Here the word olam is taken in its own proper meaning, as the words immediately following prove - to be a God unto thee, and thy seed after thee; for as the soul is to endure for ever, so it shall eternally stand in need of the supporting power and energy of God; and as the reign of the Gospel dispensation shall be as long as sun and moon endure, and its consequences eternal, so must the covenant be on which these are founded.

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.

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; and it is not only thy seed after the flesh, but thy spiritual seed. It is everlasting in the evangelical meaning of it. The covenant of grace is everlasting; it is from everlasting in the counsels of it, and to everlasting in the consequences of it; and the external administration of it is transmitted, with the seal of it, to the seed of believers, and the internal administration of it by the Spirit to Christ's seed in every age. This is a covenant of exceeding great and precious promises. Here are two which indeed are all-sufficient, that God would be their God. 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.