55 For my flesh is meat indeed, and my blood is drink indeed.
[AD 500] Desert Fathers on John 6:51-56
Daniel the disciple of Arsenius used to talk also about a hermit in Scetis, saying that he was a great man but simple in the faith, and in his ignorance he thought and said that the bread which we receive is not in very truth the Body of Christ, but a symbol of His Body. Two of the monks heard what he said but because they knew of his sublime works and labours, they imagined that he had said it in innocence and simple-mindedness; and so they came to him and said unto him, ‘Abba, someone told us something that we do not believe; he said that this bread that we receive is not in very truth the Body of Christ, but a mere symbol.’ He said to them, ‘I said that.’ They begged him, saying, ‘You mustn’t say that, abba; according to what the Catholic Church has handed down to us, even so do we believe, that is to say, this bread is the Body of Christ in very truth, and is not a mere symbol. It is the same as when God took dust from the earth, and made man in His image; just as no one can say that he is not the image of God, so also with the bread of which He said, “This is My Body” is not to be regarded as a merely commemorative thing; we believe that it is indeed the Body of Christ.’ The hermit said, ‘Unless I can be convinced by the thing itself I will not listen to this.’ Then the monks said to him, ‘Let us pray to God all week about this mystery, and we believe that He will reveal the truth to us.’ The hermit agreed to this with great joy, and each went to his cell. Then the hermit prayed, saying, ‘O Lord, you know that it is not out of wickedness that I do not believe, so in order that I may not go astray through ignorance, reveal to me, Lord Jesus Christ, the truth of this mystery.’ The other two brothers prayed to God and said, ‘Lord Jesus Christ, give this hermit understanding about this mystery, and we believe that he will not be lost.’ God heard the prayer of the two monks. When the week was over they came to the church, and the three of them sat down by themselves on one seat, the hermit between the other two. The eyes of their understanding were opened, and when the time of the mysteries arrived, and the bread was laid upon the holy table, there appeared to the three of them as it were a child on the table. Then the priest stretched out his hand to break the bread, and behold the angel of the Lord came down from heaven with a knife in his hand, and he killed the child and pressed out his blood into the cup. When the priest broke off from the bread small pieces, the hermit went forward to receive communion and a piece of living flesh smeared and dripping with blood was given to him. Now when he saw this he was afraid and he cried out loudly, saying, ‘Lord, I believe that the bread is Your Body, and that the cup is Your Blood.’ At once the flesh that was in his hand became bread, and he took it and gave thanks to God. The brothers said to him, ‘God knows the nature of men, and that we are unable to eat living flesh, and so He turneth His Body into bread, and His Blood into wine for those who receive Him in faith.’ Then they gave thanks to God for the hermit, because He had not let Satan destroy him, and the three of them went back to their cells joyfully.

[AD 500] Desert Fathers on John 6:51-56
Poemen said, ‘It is written, “Like as the hart longs for the waterbrooks, so longs my soul for you, O my God” (Ps. 42:1). Indeed, the harts in the desert eat many snakes and when their venom makes them burn with thirst they come to the waters to assuage their burning thirst. It is the same for monks: in the desert, they are burned by the poison of the demons and they long for Saturday and Sunday to come so that they can go to the springs of water, that is, to the Body and Blood of the Lord, to be purified from the poison of the evil ones.’

[AD 215] Clement of Alexandria on John 6:55
For those who are full-grown are said to drink, babes to suck. "For my blood "says the Lord, "is true drink."

[AD 367] Hilary of Poitiers on John 6:55-59
(vii. de Trin. c. 14) 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 dwelleth in us by His flesh. (c.14:19) And we shall live by Him, according as He liveth. If then we live naturally by partaking of Him according to the flesh, He also liveth naturally by the indwelling of the Father according to the Spirit. His birth did not give Him an alien or different nature from the Father.

(de Trin. x. c. 18.) 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. To say that the bread is His own, is to declare that the Word assumed His body Himself.

[AD 367] Hilary of Poitiers on John 6:55
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.
[AD 367] Hilary of Poitiers on John 6:55
If in truth the Word has been made flesh and we in very truth receive the Word made flesh as food from the Lord, are we not bound to believe that he abides in us naturally? [Jesus], born as a man, has assumed the nature of our flesh now inseparable from himself and has joined together the nature of his own flesh to the nature of the eternal Godhead in the sacrament by which his flesh is communicated to us. For in this way we are all one because the Father is in Christ and Christ is in us.… And so, if indeed Christ has taken to himself the flesh of our body, and that man who was born from Mary was indeed Christ, and we indeed receive in a mystery the flesh of his body—and because of this we shall be one, because the Father is in him and he in us—how can a unity of will be maintained, seeing that the special property of nature received through the sacrament is the sacrament of a perfect unity?…As to what we say concerning the reality of Christ’s nature within us, unless we have been taught by him our words are foolish and impious. For he says himself, “My flesh is true food, and my blood is true drink. Those who eat my flesh and drink my blood abide in me, and I in them.” As to the verity of the flesh and blood there is no room left for doubt. For now, both from the declaration of the Lord himself and our own faith, it is truly flesh and truly blood. And these when eaten and drunk enable both that we are in Christ and Christ is in us. Is this not true? Yet those who affirm that Christ Jesus is not truly God are welcome to find it false. He therefore himself is in us through the flesh and we are in him, while together with him our own selves are in God.

[AD 407] John Chrysostom on John 6:55-59
(Hom. xlvii. 1) i. e. this is no enigma, or parable, but ye must really eat the body of Christ; or He means to say that the true meat was He who saved the soul.

(Hom. xlvii. 1) Or, having given a promise of eternal life to those that eat Him, He says this to confirm it: He that eateth My flesh, and drinketh My blood, dwelleth in Me, and I in him.

(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.

(Hom. xlvii. 1) For if it was possible without harvest or fruit of the earth, or any such thing, to preserve the lives of the Israelites of old for forty years, much more will He be able to do this with that spiritual food, of which the manna is the type. He knew how precious a thing life was in men's eyes, and therefore repeats His promise of life often; just as the Old Testament had done; (Exod. 20:12) only that it only offered length of life, He life without end. (Deut. 22:7) This promise was an abolition of that sentence of death, which sin had brought upon us. These things said He in the synagogue, as He taught in Capernaum; (1 Kings 3:14) where many displays of His power took place. (Ps. 21:4; 91:16) He taught in the synagogue and in the temple, (Prov. 3:2) with the view of attracting the multitude, and as a sign that He was not acting in opposition to the Father.

[AD 407] John Chrysostom on John 6:55
What is that He says? He either desires to declare that this is the true meat which saves the soul, or to assure them concerning what had been said, that they might not suppose the words to be a mere enigma or parable, but might know that it is by all means needful to eat the Body. Then He says,
[AD 407] John Chrysostom on John 6:55
Either he means to say that the true food was he who saved the soul. Or, he means to assure them that what he had said was no mere enigma or parable but that you must really eat the body of Christ.

[AD 430] Augustine of Hippo on John 6:55-59
(super Joan. c. xxvi. 15) By this meat and drink then, He would have us understand the society of His body, and His members, which is the Church, in the predestined, and called, and justified, and glorified saints and believers. The Sacrament whereof, i. e. of the unity of the body and blood of Christ, is administered, in some places daily, in others on such and such days from the Lord's Table: and from the Lord's Table it is received by some to their salvation, by others to their condemnation. But the thing itself of which this is the Sacrament, is for our salvation to every one who partakes of it, for condemnation to none. To prevent us supposing that those who, by virtue of that meat and drink, were promised eternal life, would not die in the body, He adds, And I will, raise him up at the last day; i. e. to that eternal life, a spiritual rest, which the spirits of the Saints enter into. But neither shall the body be defrauded of eternal life, but shall be endowed with it at the resurrection of the dead in the last day.

(Tr. xxvi. 17) Or thus: Whereas men desire meat and drink to satisfy hunger and thirst, this effect is only really produced by that meat and drink, which makes the receivers of it immortal and incorruptible; i. e. the society of Saints, where is peace and unity, full and perfect. On which account our Lord has chosen for the types of His body and blood, things which become one out of many. Bread is a quantity of grains united into one mass, wine a quantity of grapes squeezed together. Then He explains what it is to eat His body and drink His blood: He that eateth My flesh, and drinketh My blood, dwelleth in Me, and I in him. So then to partake of that meat and that drink, is to dwell in Christ and Christ in thee. He that dwelleth not in Christ, and in whom Christ dwelleth not, neither eateth His flesh, nor drinketh His blood: but rather eateth and drinketh the sacrament of it to his own damnation.

(de Verb. Dom.) As for those, as indeed there are many, who either eat that flesh and drink that blood hypocritically, or, who having eaten, become apostates, do they dwell in Christ, and Christ in them? Nay, but there is a certain mode of eating that flesh, and drinking that blood, in the which he that eateth and drinketh, dwelleth in Christ, and Christ in him.

(de Civ. Dei, l. xxi. c. 25) That is to say, such an one eateth the body and drinketh the blood of Christ not in the sacramental sense, but in reality.

(Tr. xxvi. s. 19) He saith not, As I eat the Father, and live by the Father, so he that eateth Me, even he shall live by Me. For the Son does not grow better by partaking of the Father, as we do by partaking of the Son, i. e. of His one body and blood, which this eating and drinking signifies. So that His saying, I live by the Father, because He is from Him, must not be understood as detracting from His equality. Nor do the words, Even he that eateth Me, the same shall live by Me, give us the equality that He has. He does not equalize, but only mediates between God and man. If, however, we understand the words, I live by the Father, in the sense of those below, My Father is greater than I, (c. 14:28) then it is as if He said, That I live by the Father, i. e. refer my life to Him, as my superior, my1 humiliation in my incarnation is the cause; but He who lives by Me, lives by Me by virtue of partaking of My flesh.

(Tr. xxvi. c. 20) That we who cannot obtain eternal life of ourselves, might live by the eating that bread, He descended from heaven: This is the bread which cometh down from heaven.

(Tr. xxvi. 20) The death here meant is death eternal. For even those who eat Christ are subject to natural death; but they live for ever, because Christ is everlasting life.

[AD 430] Augustine of Hippo on John 6:55
Or think of it this way: Whereas people desire meat and drink to satisfy hunger and thirst, real satisfaction is produced only by that meat and drink that make the receivers of it immortal and incorruptible. He’s talking here about the fellowship of the saints where there is peace and unity, full and perfect. Therefore … our Lord has chosen for the types of his body and blood things that become one out of many. Bread is a quantity of grains united into one mass, wine a quantity of grapes squeezed together. Then he explains what it is to eat his body and drink his blood: “He that eats my flesh and drinks my blood dwells in me and I in him.” So then to partake of that meat and that drink is to dwell in Christ and Christ in you. Whoever does not dwell in Christ, and in whom Christ does not dwell, neither eats his flesh nor drinks his blood; rather, he eats and drinks the sacrament of it to his own damnation.

[AD 444] Cyril of Alexandria on John 6:55
Again does He contrast the Mystic Blessing with the supply of manna, and the savour of the cup with the founts from rocky beds. And what He said afore in other words, this He again says here, manifoldly fashioning the same discourse. For He does not advise them to marvel overmuch at the manna, but rather to receive Him, as Bread from Heaven, and the Giver of eternal life. For Your fathers (He says) ate the manna in the wilderness and died: this is the Bread Which cometh down from heaven, that a man may eat thereof and not die. For the food of manna (says He) having for a very little time sported with the need of the body, and driven away the hurt of want, was again powerless, and did not engraft eternal life in them that had eaten thereof. That then was not the true Food, and Bread from heaven, that is; but the Holy Body of Christ, Which nourishes to immortality and life everlasting, |422 is verily the true Food. 'Yea and they drank water also from the rock.' 'And what then' (He says) 'or what the profit to them who drank? for they have died.' That too then was not true drink; but true Drink in truth is found to be the Precious Blood of Christ, Which uproots from the foundation all corruption, and dislodges death which dwelt in the flesh of man. For it is not the Blood of any chance man, but of the Very Life that is by Nature. Wherefore we are entitled both the Body and the members of Christ, as receiving through the Blessing the Son Himself in ourselves.
[AD 604] Gregory the Dialogist on John 6:55
And, "My flesh is meat indeed, and my blood is drink indeed; "
[AD 735] Bede on John 6:55-59
He had said above, Whoso eateth My flesh and drinketh My blood, hath eternal life: and now to show the great difference between bodily meat and drink, and the spiritual mystery of His body and blood, He adds, For My flesh is meat indeed, and My blood is drink indeed.

And to show the wide interval between the shadow and the light, the type and the reality, He adds, Not as your fathers did eat manna, and are dead: he that eateth of this bread shall live for ever.

Mystically, Capernaum, which means beautiful town, stands for the world: the synagogue, for the Jewish people. The meaning is, that our Lord hath, by the mystery of the incarnation, manifested Himself to the world, and also taught the Jewish people His doctrines.

[AD 1107] Theophylact of Ohrid on John 6:55-59
For we do not eat God simply, God being impalpable and incorporeal; nor again, the flesh of man simply, which would not profit us. But God having taken flesh into union with Himself, that flesh is quickening. Not that it has changed its own for the Divine nature; but, just as heated iron remains iron, with the action of the heat in it; so our Lord's flesh is quickening, as being the flesh of the Word of God.