Hebrews 9:16-17

For where a testament is That is, where there is a covenant, which is also a testament; there must of necessity be the death of the testator As if he had said, The reason why there was a necessity that Christ should die, is taken from the nature of the covenant whereof he is Mediator, which covenant is also a testament, and therefore could not be of force but by his death. For a testament is of force Has validity; after men are dead When, and not before, the legatees may claim their legacies. Otherwise it is of no strength at all while the testator liveth And therefore hath power to alter his will at pleasure. But it is not necessary that the expression του διαθεμενου, at the end of Hebrews 9:16, should signify a testator, properly so called: it may mean only a promiser, and one that confirms his promise with his own blood. For διατιθημι, according to Phavorinus, is, I promise, I covenant; and διατιθεσθαι διαθηκην is very commonly in profane authors, to enter into covenant; and in the same sense the phrase is used in the Old Testament; and therefore the participle διαθεμενος, derived from the same verb, must probably have the same signification here, in which it is continually used by the LXX., and which it always bears in the New Testament. Thus, Acts 3:25, Ye are the children, διαθηκης ης διεθετο, of the covenant which God made with our fathers; Luke 22:29; καγω διατιθεμαι υμιν, and I appoint to you a kingdom, καθως διεθετο, as my Father hath appointed to me. So in this epistle, Hebrews 8:10; Hebrews 10:16, αυτη η διαθηκη ην διαθησομαι, This is the covenant which I will make with the house of Israel. And because covenants were usually made victimas cædendo, by sacrifices, as the Hebrew, Greek, and Latin expressions used in the making of covenants show; accordingly, the new covenant was established in the blood of Jesus. Hence the apostle speaks thus of this covenant, and the appointed disposer or maker of it. This sense of the passage is defended at large by Dr. Macknight, in a note too long to be here quoted. His paraphrase on it is as follows: “And for this reason, that the death of Christ is so efficacious, [namely, as is set forth in Hebrews 9:13,] of the new covenant he is the Mediator, or High-Priest, by whom its blessings are dispensed; and also the sacrifice by which it is procured and ratified; that his death being accomplished for obtaining the pardon of the transgressions of the first covenant, believers of all ages and nations, as the called seed of Abraham, (Romans 8:28,) may receive the promised eternal inheritance. For where a covenant is made by sacrifice, there is a necessity that the death of the appointed sacrifice be produced. For According to the practice of God and man; a covenant is made firm over dead sacrifices, seeing it never hath force while the goat, calf, or bullock, appointed as the sacrifice of ratification, liveth. Because from the beginning God ratified his covenant by sacrifice, to preserve among men the expectation of the sacrifice of his Son; hence not even the covenant of Sinai was made without sacrifice.”