It is the spirit that gives life; the flesh profits nothing: the words that I speak unto you, they are spirit, and they are life.
All Commentaries on John 6:63 Go To John 6
Cornelius a Lapide
AD 1637
If therefore ye shall see, &c. "He is speaking," says Euthymius, "concerning His future assumption into heaven." For some of them, such as the Apostles, beheld this. And others, who did not believe, although they saw it not, might have heard, and certainly learnt from those who did see.
Where He was before, as regards His Divinity, says Euthymius. For He ascended into heaven, as regards His humanity. What will ye say, must be understood, as Euthymius observes. "Will ye be still scandalized? I trust not. Certainly I know ye will not rightly be so. For by My ascension into heaven by My own power ye will be able to know that I came down from heaven, and that I return whither I was before, and therefore that I am not only true and a prophet, but that I am also God, and the Son of God, to whom all things are possible, yea easy, and therefore that I am able to give My Flesh for food, and by It to raise the dead. From the miracle of His ascension into heaven Christ rightly proves His Divinity and omnipotence, and from them the mystery of the Eucharist. For to the Deity nothing is impossible, nothing strange, nothing paradoxical. Yea, it is becoming to Deity to do things strange (nova) and paradoxical, which are above nature and human reason. As S. Cyril says, "By another wonderful thing He urges them to faith," and that appositely. For the ascension of Christ into heaven signified that He came down from heaven (for He went back from whence He came), and therefore that He was the Living Bread which came down from heaven, which was what He here wished to persuade the Capharnaites.
Maldonatus explains otherwise, thus, "When ye shall hear that I have ascended into heaven, what will ye say? Surely ye will be still more scandalized; ye will still less believe Me; ye will say that I am a sorcerer, who by the aid of the devils have pretended to fly into heaven."