Ambrose of Milan : Therefore, whenever you receive, what does the Apostle say to you? Whenever we receive, we proclaim the death of the Lord. If we proclaim his death, we proclaim the forgiveness of sins. Whenever his blood is poured out, it is poured out for the forgiveness of sins; I must always receive it, so that my sins are always forgiven. As I always sin, I must always have the medicine. — On the Sacraments, Book 4, Chapter 6 Ambrosiaster : Paul shows that the Lord's Supper is not a meal in the normal sense but spiritual medicine, which purifies the recipient if he partakes of it reverently. It is the memorial of our redemption, so that mindful of our Redeemer we might follow him more closely. — COMMENTARY ON PAUL'S EPISTLES Apostolic Constitutions : We also, our Father, thank You for the precious blood of Jesus Christ, which was shed for us and for His precious body, whereof we celebrate this representation, as Himself appointed us, "to show forth His death." [1 Corinthians 11:26] For through Him glory is to be given to You forever. Amen. Let no one eat of these things that is not initiated; but those only who have been baptized into the death of the Lord. But if any one that is not initiated conceal himself, and partake of the same, "he eats eternal damnation;" because, being not of the faith of Christ, he has partaken of such things as it is not lawful for him to partake of, to his own punishment. But if any one is a partaker through ignorance, instruct him quickly, and initiate him, that he may not go out and despise you. — Apostolic Constitutions (Book VII), Section 2, XXXV Cyprian : And because we make mention of His passion in all sacrifices (for the Lord's passion is the sacrifice which we offer), we ought to do nothing else than what He did. For Scripture says, "For as often as ye eat this bread and drink this cup, ye do show forth the Lord's death till He come." As often, therefore, as we offer the cup in commemoration of the Lord and of His passion, let us do what it is known the Lord did. And let this conclusion be reached, dearest brother: if from among our predecessors any have either by ignorance or simplicity not observed and kept this which the Lord by His example and teaching has instructed us to do, he may, by the mercy of the Lord, have pardon granted to his simplicity. But we cannot be pardoned who are now admonished and instructed by the Lord to offer the cup of the Lord mingled with wine according to what the Lord offered, and to direct letters to our colleagues also about this, so that the evangelical law and the Lord's tradition may be everywhere kept, and there be no departure from what Christ both taught and did. — Epistle LXII Cyril of Alexandria : Proclaiming the death according to the flesh of the only begotten Son of God, that is, of Jesus Christ, and confessing his resurrection from the dead and his ascension into heaven, we celebrate the unbloody sacrifice in the churches, and we thus approach the spiritual blessings and are made holy, becoming partakers of the holy flesh and of the precious blood of Christ, the Savior of us all. — LETTER 17.12 John Chrysostom : Next, having spoken concerning that Supper, he connects the things present with the things of that time, that even as on that very evening and reclining on that very couch and receiving from Christ Himself this sacrifice, so also now might men be affected; and he saith, "For as often as ye eat this bread, and drink this cup, ye proclaim the Lord's death till He come." For as Christ in regard to the bread and the cup said, "Do this in remembrance of Me," revealing to us the cause of the giving of the Mystery, and besides what else He said, declaring this to be a sufficient cause to ground our religious fear upon:-(for when thou considerest what thy Master hath suffered for thee, thou wilt the better deny thyself:)-so also Paul saith here: "as often as ye eat ye do proclaim His death." And this is that Supper. Then intimating that it abides unto the end, he saith, "till He come." — Homily on 1 Corinthians 27