12 If, then, the flesh laid down its life, how did Christ lay down His life? For the flesh is not Christ. Certainly in this way, that Christ is both flesh, and soul, and the Word; and yet these three things are not three Christs, but one. Ask your own human nature, and from yourself ascend to what is above you, and which, if not yet able to be understood, can at least be believed. For in the same way that one man is soul and body, is one Christ both the Word and man.
Consider what I have said, and understand. The soul and body are two things, but one man: the Word and man are two things, but one Christ. Apply, then, the subject to any man. Where is now the Apostle Paul? If one answer, At rest with Christ, he speaks truly. And likewise, should one reply, In the sepulchre at Rome, he is equally right. The one answer I get refers to his soul, the other to his flesh. And yet we do not say that there are two Apostle Pauls, one who rests in Christ, another who was laid in the sepulchre; although we may say that the Apostle Paul lives in Christ, and that the same apostle lies dead in the tomb.
Some one dies, and we say, He was a good man, and faithful; he is in peace with the Lord: and then immediately, Let us attend his obsequies, and lay him in the sepulchre. You are about to bury one whom you had just declared to be in peace with God; for the latter regards the soul which blooms eternally, and the other the body, which is laid down in corruption. But while the partnership of the flesh and soul has received the name of man, the same name is now applied to either of them, singly and by itself.
Source: Tractates on the Gospel of John (New Advent)