A New Covenant – Hebrews 8:8

From this supposition the apostle proves that the first covenant is imperfect, blamable, and removable. And the force of his inference depends on a common notion or presumption, that is clear and evident in its own light. And it is this, when once a covenant is made and established, if it will serve unto and effect all that he who makes it doth design, and exhibit all the good which he intends to communicate, there is no reason why another covenant should be made. The making of a new for no other ends or purposes but what the old was every way sufficient for, argues lightness and mutability in him that made it. Unto this purpose doth he argue, Gal. 3:21, “If there had been a law given which could have given life, verily righteousness should have been by the law.” Could the first covenant have perfected and consecrated the church, could it have communicated all the grace and mercy that God intended to indulge unto the children of men, the wise and holy author of it would have had no thought about the introduction and establishment of another. It would have been no way agreeable unto his infinite wisdom and faithfulness so to do. Wherefore the promise hereof doth irrefragably prove, that both the first covenant and all the services of it were imperfect, and therefore to be removed and taken away. – John Owen