John Chrysostom — as excerpted in the Catena Aurea on John 6:35-40

“(Hom. xlv. 2) Our Lord now proceeds to set forth mysteries; and first speaks of His Divinity: And Jesus said unto them, I am the bread of life. He does not say this of His body, for He speaks of that at the end; The bread that I will give you is My flesh. Here He is speaking of His Divinity. The flesh is bread, by virtue of the Word; this bread is heavenly bread, on account of the Spirit which dwelleth in it.”