Hebrews 9:15

It was probable that many of those who were more weakly would especially distrust the promises of Christ because He had died. Paul accordingly out of a superabundance introduced this illustration, deriving it from common custom. Of what kind is it? He says, "indeed, on this very account we ought to be of good courage." On what account? Because testaments are established and obtain their force when those who have made them are not living, but dead. "And for this cause," he says, "He is the Mediator of the New Testament." A Testament is made towards the last day, [the day] of death. And a testament is of this character: It makes some heirs, and some disinherited. So in this case also: "I will that where I am," Christ says, "they also may be." And again of the disinherited, hear Him saying, "I pray not for" all, "but for them that believe on Me through their word." Again, a testament has relation both to the testator, and to the legatees; so that they have some things to receive, and some to do, So also in this case. For after having made promises innumerable, He demands also something from them, saying, "a new commandment I give unto you." Again, a testament ought to have witnesses. Hear Him again saying, "I am one that bear witness of Myself, and He that sent Me beareth witness of Me." And again, "He shall testify of Me," speaking of the Comforter. The twelve Apostles too He sent, saying, "Bear ye witness before God." "And for this cause" (he says) "He is the Mediator of the New Testament." What is a "Mediator"? A mediator is not lord of the thing of which he is mediator, but the thing belongs to one person, and the mediator is another: as for instance, the mediator of a marriage is not the bridegroom, but one who aids him who is about to be married. So then also here: The Son became Mediator between the Father and us. The Father willed not to leave us this inheritance, but was wroth against us, and was displeased [with us] as being estranged [from Him]; He accordingly became Mediator between us and Him, and prevailed with Him. And what then? How did He become Mediator? He brought words from [Him] and brought [them to us], conveying over what came from the Father to us, and adding His own death thereto. We had offended: we ought to have died: He died for us and made us worthy of the Testament. By this is the Testament secure, in that henceforward it is not made for the unworthy. At the beginning indeed, He made His dispositions as a father for sons; but after we had become unworthy, there was no longer need of a testament, but of punishment. Why then (he would say) dost thou think upon the law? For it placed us in a condition of so great sin, that we could never have been saved, if our Lord had not died for us; the law would not have had power, for it is weak.