15. But that which they ask, while striving among themselves, namely, how the Lord can give His flesh to be eaten, they do not immediately hear: but further it is said to them, “Verily, verily, I say unto you, except ye eat the flesh of the Son of man, and drink His blood, ye will have no life in you.” How, indeed, it may be eaten, and what may be the mode of eating this bread, ye are ignorant of; nevertheless, “except ye eat the flesh of the Son of man, and drink His blood, ye will not have life in you.” He spoke these words, not certainly to corpses, but to living men. Whereupon, lest they, understanding it to mean this life, should strive about this thing also, He going on added, “Whoso eateth my flesh, and drinketh my blood, hath eternal life.” Wherefore, he that eateth not this bread, nor drinketh this blood, hath not this life; for men can have temporal life without that, but they can noways have eternal life. He then that eateth not His flesh, nor drinketh His blood, hath no life in him; and he that eateth His flesh, and drinketh His blood, hath life. This epithet, eternal, which He used, answers to both. It is not so in the case of that food which we take for the purpose of sustaining