round Him, who had known their disease, seeing He was the Physician, who had known the frenzy by which they had become infatuated, He said at once to the Father, “Father, forgive them; for they know not what they do.”2680 Now suppose ye that those Jews were not malignant, cruel, bloody, turbulent, and enemies of the Son of God? Suppose ye that that cry, “Father, forgive them, for they know not what they do,” was ineffectual and in vain? He saw them all, but He knew amongst them those that should one day be His. In a word, He died, because it was so expedient, that by His Death He might kill death. God died, that an exchange might be effected by a kind of heavenly contract, that man might not see death. For Christ is God, but He died not in that Nature in which He is God. For the same Person is God and man; for God and man is one Christ. The human nature2681 was assumed, that we might be changed for the better; He did not degrade the Divine2682 Nature down to the lower. For He assumed that which He was not, He did not lose that which He was. Forasmuch then as He is both God and man, being pleased that we should live by that which was His, He died in that which was ours. For He had nothing Himself, whereby He could die; nor had we anything whereby we could live. For what was He who had nothing whereby He could die? “In the beginning was the Word, and the Word was with God, and the Word was God.” 2683 If thou seek for anything in God whereby He may die, thou wilt not find it. But we all die, who are flesh; men bearing about sinful flesh. Seek out for that whereby sin may live; it hath it not. So then neither could He have death in that which was His own, nor we life in that which was our own; but we have life from that which is His, He death from what is ours. What an exchange! What hath He given, and what received? Men who trade enter into commercial intercourse for exchange of things. For ancient commerce was only an exchange of things. A man gave what he had, and received what he had not. For example, he had wheat, but had no barley; another had barley, but no wheat; the former gave the wheat which he had, and received the barley which he had not. How2684 simple it was that the larger quantity should make up for the cheaper sort! So then another man gives barley, to receive wheat; lastly, another gives lead, to receive silver, only he gives much lead against a little silver; another gives wool, to receive a ready-made garment. And who can enumerate all these exchanges? But no one gives life to receive death. Not in vain then was the voice of the Physician as He hung upon the tree. For in order that He might die for us because the Word could not die, “The Word was made flesh, and dwelt among us.”2685 He hung upon 2680 Luke xxiii. 34. 2681 Homo. 2682 Deum. 2683 John i. 1. 2684 Quanti erat. 2685 John i. 14. 739 On the words of the Gospel, Matt. xvii. 19, ‘Why could not we cast it out’?…