The Death of Christ Voluntary. How the Mediator of Life Subdued the Mediator of Death. How the Devil Leads His Own to Despise the Death of Christ
16 Wherefore, since the spirit is to be preferred to the body, and the death of the spirit means that God has left it, but the death of the body that the spirit has left it; and since herein lies the punishment in the death of the body, that the spirit leaves the body against its will, because it left God willingly; so that, whereas the spirit left God because it would, it leaves the body although it would not; nor leaves it when it would, unless it has offered violence to itself, whereby the body itself is slain: the spirit of the Mediator showed how it was through no punishment of sin that He came to the death of the flesh, because He did not leave it against His will, but because He willed, when He willed, as He willed. For because He is so commingled [with the flesh] by the Word of God as to be one, He says: “I have power to lay down my life, and I have power to take it again. No man takes it from me, but I lay down my life that I might take it again.” And, as the Gospel tells us, they who were present were most astonished at this, that after that [last] word, in which He set forth the figure of our sin, He immediately gave up His spirit. For they who are hung on the cross are commonly tortured by a prolonged death. Whence it was that the legs of the thieves were broken, in order that they might die directly, and be taken down from the cross before the Sabbath. And that He was found to be dead already, caused wonder. And it was this also, at which, as we read, Pilate marvelled, when the body of the Lord was asked of him for burial.
17. Because that deceiver then—who was a mediator to death for man, and feignedly puts himself forward as to life, under the name of cleansing by sacrilegious rites and sacrifices, by which the proud are led away—can neither share in our death, nor rise again from his own: he has indeed been able to apply his single death to our double one; but he certainly has not been able to apply a single resurrection, which should be at once a mystery of our renewal, and a type of that waking up which is to be in the end. He then who being alive in the spirit raised again His own flesh that was dead, the true Mediator of life, has cast out him, who is dead in the spirit and the mediator of death, from the spirits of those who believe in Himself, so that he should not reign within, but should assault from without, and yet not prevail. And to him, too, He offered Himself to be tempted, in order that He might be also a mediator to overcome his temptations, not only by succor, but also by example. But when the devil, from the first, although striving through every entrance to creep into His inward parts, was thrust out, having finished all his alluring temptation in the wilderness after the baptism; because, being dead in the spirit, he forced no entrance into Him who was alive in the spirit, he betook himself, through eagerness for the death of man in any way whatsoever, to effecting that death which he could, and was permitted to effect it upon that mortal element which the living Mediator had received from us. And where he could do anything, there in every respect he was conquered; and wherein he received outwardly the power of slaying the Lord in the flesh, therein his inward power, by which he held ourselves, was slain. For it was brought to pass that the bonds of many sins in many deaths were loosed, through the one death of One which no sin had preceded. Which death, though not due, the Lord therefore rendered for us, that the death which was due might work us no hurt. For He was not stripped of the flesh by obligation of any authority, but He stripped Himself. For doubtless He who was able not to die, if He would not, did die because He would: and so He made a show of principalities and powers, openly triumphing over them in Himself. For whereas by His death the one and most real sacrifice was offered up for us, whatever fault there was, whence principalities and powers held us fast as of right to pay its penalty, He cleansed, abolished, extinguished; and by His own resurrection He also called us whom He predestinated to a new life; and whom He called, them He justified; and whom He justified, them He glorified. And so the devil, in that very death of the flesh, lost man, whom he was possessing as by an absolute right, seduced as he was by his own consent, and over whom he ruled, himself impeded by no corruption of flesh and blood, through that frailty of man's mortal body, whence he was both too poor and too weak; he who was proud in proportion as he was, as it were, both richer and stronger, ruling over him who was, as it were, both clothed in rags and full of troubles. For whither he drove the sinner to fall, himself not following, there by following he compelled the Redeemer to descend. And so the Son of God deigned to become our friend in the fellowship of death, to which because he came not, the enemy thought himself to be better and greater than ourselves. For our Redeemer says, “Greater love has no man than this, that a man lay down his life for his friends.” Wherefore also the devil thought himself superior to the Lord Himself, inasmuch as the Lord in His sufferings yielded to him; for of Him, too, is understood what is read in the Psalm, “For You have made Him a little lower than the angels:” so that He, being Himself put to death, although innocent, by the unjust one acting against us as it were by just right, might by a most just right overcome him, and so might lead captive the captivity wrought through sin, and free us from a captivity that was just on account of sin, by blotting out the handwriting, and redeeming us who were to be justified although sinners, through His own righteous blood unrighteously poured out.
Source: On the Holy Trinity (New Advent)