For my flesh is food indeed, and my blood is drink indeed.
All Commentaries on John 6:55 Go To John 6
Hilary of Poitiers
AD 368
Of the truth then of the body and blood of Christ, no room for doubting remains: for, by the declaration of our Lord Himself, and by the teaching of our own faith, the flesh is really flesh, and the blood really blood. This then is our principle of life. While we are in the flesh, Christ dwells in us by His flesh. And we shall live by Him, according as He lives. If then we live naturally by partaking of Him according to the flesh, He also lives naturally bythe indwelling of the Father according to the Spirit. His birth did not give Him an alien or different nature from the Father.
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. Tosay that the bread is His own, is to declare that the Word assumed His body Himself.