Augustine of Hippo — as excerpted in the Catena Aurea on John 6:47-51

“(Tr. xxvi. s. 10.) Our Lord wishes to reveal what He is; Verily, verily, I say unto you, He that believeth on Me, hath everlasting life. As if He said; He that believeth on Me hath Me: but what is it to have Me? It is to have eternal life: for the Word which was in the beginning with God is life eternal, and the life was the light of men. Life underwent death, that life might kill death.”