John Chrysostom
Catena Aurea · Johannesevangelium 6
For my flesh is meat indeed, and my blood is drink indeed. He that eateth my flesh, and drinketh my blood, dwelleth in me, and I in him. As the living Father hath sent me, and I live by the Father: so he that eateth me, even he shall live by me. 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. These things said he in the synagogue, as he taught in Capernaum.
(Hom. xlvi) And because I live, it is manifest that he will live also: As the living Father hath sent Me, and I lice by the Father, even so he that eateth Me, even he shall live by Me. (Aug. de Verb. Dom. [Nic.]). As if He said, As the Father liveth, so do I live; adding, lest you should think Him unbegotten, By the Father, meaning that He has His source in the Father. He that eateth Me, even he shall live by Me; the life here meant is not life simply, but the justified life: for even unbelievers live, who never eat of that flesh at all. Nor is it of the general resurrection He speaks, (for all will rise again,) but of the resurrection to glory, and reward.