Clement of Alexandria (150 – c. 215): But if human wisdom, as it remains to understand, is the glorying in knowledge, hear the law of Scripture: “Let not the wise man glory in his wisdom, and let not the mighty man glory in his might; but let him that glorieth glory in the Lord.”[ Jer. ix. 23; 1 Cor. i. 31; 2 Cor. x. 17.] But we are God-taught, and glory in the name of Christ. How then are we not to regard the apostle as attaching this sense to the milk of the babes? And if we who preside over the Churches are shepherds after the image of the good Shepherd, and you the sheep, are we not to regard the Lord as preserving consistency in the use of figurative speech, when He speaks also of the milk of the flock? And to this meaning we may secondly accommodate the expression, “I have given you milk to drink, and not given you food, for ye are not yet able,” regarding the meat not as something different from the milk, but the same in substance. For the very same Word is fluid and mild as milk, or solid and compact as meat. And entertaining this view, we may regard the proclamation of the Gospel, which is universally diffused, as milk; and as meat, faith, which from instruction is compacted into a foundation, which, being more substantial than hearing, is likened to meat, and assimilates to the soul itself nourishment of this kind. Elsewhere the Lord, in the Gospel according to John, brought this out by symbols, when He said: “Eat ye my flesh, and drink my blood;”[John vi.53] describing distinctly by metaphor the drinkable properties of faith and the promise, by means of which the Church, like a human being consisting of many members, is refreshed and grows, is welded together and compacted of both,—of faith, which is the body, and of hope, which is the soul; as also the Lord of flesh and blood. For in reality the blood of faith is hope, in which faith is held as by a vital principle. And when hope expires, it is as if blood flowed forth; and the vitality of faith is destroyed. ANF02, The Instructor, Book I, Chapter 6—The Name Children Does Not Imply Instruction in Elementary Principles, Christian Classics Ethereal Library, Grand Rapids, MI, pp 472
Augustine (354-430): It seemed unto them hard that He said, “Except ye eat the flesh of the Son of Man, ye have no life in you:” they received it foolishly, they thought of it carnally, and imagined that the Lord would cut off parts from His body, and give unto them; and they said, “This is a hard saying.” It was they who were hard, not the saying; for unless they had been hard, and not meek, they would have said unto themselves, He saith not this without reason, but there must be some latent mystery herein. They would have remained with Him, softened, not hard: and would have learnt that from Him which they who remained, when the others departed, learnt. For when twelve disciples had remained with Him, on their departure, these remaining followers suggested to Him, as if in grief for the death of the former, that they were offended by His words, and turned back. But He instructed them, and saith unto them, “It is the Spirit that quickeneth, but the flesh profiteth nothing; the words that I have spoken unto you, they are spirit, and they are life.” Understand spiritually what I have said; ye are not to eat this body which ye see; nor to drink that blood which they who will crucify Me shall pour forth. I have commended unto you a certain mystery; spiritually understood, it will quicken. Although it is needful that this be visibly celebrated, yet it must be spiritually understood. NPNF1: Vol. VIII, St. Augustin on the Psalms, Psalm 99 (98), §8. Grand Rapids, MI: Christian Classics Ethereal Library, Pg 960-961
Augustine (354-430): If the sentence is one of command, either forbidding a crime or vice, or enjoining an act of prudence or benevolence, it is not figurative. If, however, it seems to enjoin a crime or vice, or to forbid an act of “prudence or benevolence, it is figurative. ‘Except ye eat the flesh of the Son of man,’ says Christ, ‘and drink His blood, ye have no life in you.’ This seems to enjoin a crime or a vice; it is therefore a figure, enjoining that we should have a share in the sufferings of our Lord, and that we should retain a sweet and profitable memory of the fact that His flesh was wounded and crucified for us. Scripture says: “If thine enemy hunger, feed him; if he thirst, give him drink;” and this is beyond doubt a command to do a kindness. But in what follows, “for in so doing thou shall heap coals of fire on his head,” one would think a deed of malevolence was enjoined. Do not doubt, then, that the expression is figurative; and, while it is possible to interpret it in two ways, one pointing to the doing of an injury, the other to a display of superiority, let charity on the contrary call you back to benevolence, and interpret the coals of fire as the burning groans of penitence by which a man’s pride is cured who bewails that he has been the enemy of one who came to his assistance in distress. NPNF1, Vol. 2, Augustin, On Christian Doctrine 3.16.24. Grand Rapids, MI: Christian Classics Ethereal Library, Pg 1272
Cyril of Jerusalem (318-386): 1 Cor. xi. 23 I received of the Lord that which also I delivered unto you, how that the Lord Jesus, in the night in which He was betrayed, took bread, &c.
1. Even of itself the teaching of the Blessed Paul is sufficient to give you a full assurance concerning those Divine Mysteries, of which having been deemed worthy, ye are become of the same body and blood with Christ. For you have just heard him say distinctly, That our Lord Jesus Christ in the night in which He was betrayed, took bread, and when He had given thanks He brake it, and gave to His disciples, saying, Take, eat, this is My Body: and having taken the cup and given thanks, He said, Take, drink, this is My Blood. Since then He Himself declared and said of the Bread, This is My Body, who shall dare to doubt any longer? And since He has Himself affirmed and said, This is My Blood, who shall ever hesitate, saying, that it is not His blood?
2. He once in Cana of Galilee, turned the water into wine, akin to blood, and is it incredible that He should have turned wine into blood? When called to a bodily marriage, He miraculously wrought that wonderful work; and on the children of the bride-chamber [Matt. Ix. 15.], shall He not much rather be acknowledged to have bestowed the fruition of His Body and Blood?
3. Wherefore with full assurance let us partake as of the Body and Blood of Christ: for in the figure of Bread is given to thee His Body, and in the figure of Wine His Blood; that thou by partaking of the Body and Blood of Christ, mayest be made of the same body and the same blood with Him. For thus we come to bear Christ in us, because His Body and Blood are distributed through our members; thus it is that, according to the blessed Peter, we become partakers of the divine nature [2 Peter i. 4].
4. Christ on a certain occasion discoursing with the Jews said, Except ye eat My flesh and drink My blood, ye have no life in you [John vi. 53]. They not having heard His saying in a spiritual sense were offended, and went back, supposing that He was inviting them to eat flesh.
5. In the Old Testament also there was shew-bread; but this, as it belonged to the Old Testament, has come to an end; but in the New Testament there is Bread of heaven, and a Cup of salvation, sanctifying soul and body; for as the Bread corresponds to our body, so is the Word appropriate to our soul.
6. Consider therefore the Bread and the Wine not as bare elements, for they are, according to the Lord’s declaration, the Body and Blood of Christ; for even though sense suggests this to thee, yet let faith establish thee. Judge not the matter from the taste, but from faith be fully assured without misgiving, that the Body and Blood of Christ have been vouchsafed to thee. NPNF2, Vol 7, The Cathechetcal Lectures of S. Cyril, Archbishop of Jerusalem, Lecture XXII, (On the Mysteries. IV.), On the Body and Blood of Christ, Grand Rapids, MI: Christian Classics Ethereal Library, Pg 389-391
Cyril of Jerusalem (318-386): 9. Having learnt these things, and been fully assured that the seeming bread is not bread, though sensible to taste, but the Body of Christ; and that the seeming wine is not wine, though the taste will have it so, but the Blood of Christ; and that of this David sung of old, saying, And bread strengtheneth man’s heart, to make his face to shine with oil [Ps. civ. 15.], “strengthen thou thine heart,” by partaking thereof as spiritual, and “make the face of thy soul to shine.” And so having it unveiled with a pure conscience, mayest thou reflect as a mirror the glory of the Lord [2 Cor. iii. 18.], and proceed from glory to glory, in Christ Jesus our Lord:—To whom be honour, and might, and glory, for ever and ever. Amen. NPNF2, Vol 7, The Cathechetcal Lectures of S. Cyril, Archbishop of Jerusalem, Lecture XXII, (On the Mysteries. IV.), On the Body and Blood of Christ, Grand Rapids, MI: Christian Classics Ethereal Library, Pg 392