John 6:58

(de Trin. x. c. 18.) He calls Himself the bread, because He is the origin of His own body. And lest it should be thought that the virtue and nature of the Word had given way to the flesh, He calls the bread His flesh, that, inasmuch as the bread came down from heaven, it might be seen that His body was not of human conception, but a heavenly body. To say that the bread is His own, is to declare that the Word assumed His body Himself.

"This is that bread which came down from heaven; not as your fathers did eat manna, and are dead; he that eateth of this bread shall live for ever." Continually doth He handle the same point, so as to imprint it on the understanding of the hearers, (for the teaching on these points was a kind of final teaching,) and to confirm the doctrine of the Resurrection and of eternal life. Wherefore He mentioneth the Resurrection since He promiseth eternal life, showing that that life is not now, but after the Resurrection. "And whence," saith some one, "are these things clear?" From the Scriptures; to them He everywhere referreth the Jews, bidding them learn these things from them. And by saying, "Which giveth life to the world," He inciteth them to jealousy, that from very vexation that others should enjoy the gift, they may not stay without. And continually He remindeth them of the manna, showing the difference, (between it and His bread,) and guiding them to the faith; for if He was able to support their life for forty years without harvest, or corn, or other things in course; much more now will He be able to do so, as having come for greater ends. Moreover, if those things were but types, and yet men collected what came down without sweat or labor; much more shall this be the case, where the difference is great both in the never dying, and in the enjoying the true life. And rightly hath He spoken often of "life," since this is desired by men, and nothing is so pleasing to them as not to die. Since even under the old Covenant, this was the promise, length of life and many days, but now it is not length merely, but life having no end. He desireth at the same time to show, that He now revoketh the punishment caused by sin, annulling that sentence which condemneth to death, and bringing in not life merely, but life eternal, contrariwise to the former things.

(Hom. xlvii. 1) For if it was possible without harvest or fruit of the earth, or any such thing, to preserve the lives of the Israelites of old for forty years, much more will He be able to do this with that spiritual food, of which the manna is the type. He knew how precious a thing life was in men's eyes, and therefore repeats His promise of life often; just as the Old Testament had done; (Exod. 20:12) only that it only offered length of life, He life without end. (Deut. 22:7) This promise was an abolition of that sentence of death, which sin had brought upon us. These things said He in the synagogue, as He taught in Capernaum; (1 Kings 3:14) where many displays of His power took place. (Ps. 21:4; 91:16) He taught in the synagogue and in the temple, (Prov. 3:2) with the view of attracting the multitude, and as a sign that He was not acting in opposition to the Father.

"This is the bread that cometh down from heaven;" that by eating it we may live, since we cannot have eternal life from ourselves. "Not," saith He, "as your fathers did eat manna, and are dead: he that eateth this bread shall live forever." That those fathers are dead, He would have to be understood as meaning, that they do not live forever. For even they who eat Christ shall certainly die temporally; but they live forever, because Christ is eternal life.

(Tr. xxvi. c. 20) That we who cannot obtain eternal life of ourselves, might live by the eating that bread, He descended from heaven: This is the bread which cometh down from heaven. (Tr. xxvi. 20) The death here meant is death eternal. For even those who eat Christ are subject to natural death; but they live for ever, because Christ is everlasting life.