Mark 14:23

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 …

You hold the sacraments in their order. First, after the prayer, you are admonished to lift up your hearts; this befits the members of Christ. For if you have become members of Christ, where is your head? Members have a head. If the head had not gone before, the members would not follow. Where did our head go? What did you recite in the Creed? On the third day, He rose again from the dead, He ascended into heaven, He sits at the right hand of the Father. Therefore, our head is in Heaven. Thus when it is said: Lift up your hearts, you answer: We have them with the Lord. And so that you do not attribute the fact that you have your hearts with the Lord to your own strengths, merits, or labors—for it is a gift of God to have your heart lifted up to Him—the bishop or the priest who offers the sacrifice continues and says—when the people respond: We have them with the Lord—: Let us give thanks to the Lord our God, because we have our hearts with the Lord. Let us give thanks because if he did not give it, we would have our hearts on earth. And you attest by saying: It is right and just, that we should give thanks to Him who made us have our hearts lifted up to our head. Then, after the sanctification of God's sacrifice, because he willed that we ourselves should be his sacrifice—this was shown when the first sacrifice of God was laid down and we—meaning the sign of the reality—which we are; behold where the sanctification has been accomplished, we say the Lord's Prayer, which you have received and rendered. After it has been said: Peace be with you, and the Christians give each other a holy kiss. It is a sign of peace: as the lips show, let it be done in conscience, that is, just as your lips approach your brother's lips, let your heart not depart from his heart. Great indeed are the sacraments and very great indeed. Do you wish to know how they are commended? […]

Being mindful, therefore, of those things that He endured for our sakes, we give You thanks, O God Almighty, not in such a manner as we ought, but as we are able, and fulfil His constitution: "For in the same night that He was betrayed, He took bread" [1 Corinthians 11:23] in His holy and undefiled hands, and, looking up to You His God and Father, "He broke it, and gave it to His disciples, saying, This is the mystery of the new covenant: take of it, and eat. This is my body, which is broken for many, for the remission of sins." In like manner also "He took the cup," and mixed it of wine and water, and sanctified it, and delivered it to them, saying: "Drink all of this; for this is my blood which is shed for many, for the remission of sins: do this in remembrance of me. For as often as you eat this bread and drink this cup, you do show forth my death until I come." Being mindful, therefore, of His passion, and death, and resurrection from the dead, and return into the heavens, and His future second appearing, wherein He is to come with glory and power to judge the quick and the dead, and to recompense to every one according to his works, we offer to You, our King and our God, according to His constitution, this bread and this cup, giving You thanks, through Him, that You have thought us worthy to stand before You, and to sacrifice to You; and we beseech You that You will mercifully look down upon these gifts which are here set before You, O God, who standest in need of none of our offerings. […]

Now concerning the Thanksgiving (Eucharist), thus give thanks. First, concerning the cup: We thank thee, our Father, for the holy vine of David Thy servant, which Thou madest known to us through Jesus Thy Servant; to Thee be the glory for ever. And concerning the broken bread: We thank Thee, our Father, for the life and knowledge which Thou modest known to us through Jesus Thy Servant; to Thee be the glory for ever. Even as this broken bread was scattered over the hills, and was gathered together and became one, so let Thy Church be gathered together from the ends of the earth into Thy kingdom; for Thine is the glory and the power through Jesus Christ for ever. But let no one eat or drink of your Thanksgiving (Eucharist), but they who have been baptized into the name of the Lord; for concerning this also the Lord hath said, Give not that which is holy to the dogs. But after ye are filled, thus give thanks: We thank Thee, holy Father, for Thy holy name which Thou didst cause to tabernacle in our hearts, and for the knowledge and faith and immortality, which Thou modest known to us through Jesus Thy Servant; to Thee be the glory for ever. Thou, Master almighty, didst create all things for Thy name's sake; Thou gavest food and drink to men for enjoyment, that they might give thanks to Thee; but to us Thou didst freely give spiritual food and drink and life eternal through Thy Servant. Before all things we thank Thee that Thou art mighty; to Thee be the glory for ever. Remember, Lord, Thy Church, to deliver it from all evil and to make it perfect in Thy love, and gather it from the four winds, sanctified for Thy kingdom which Thou hast prepared for it; for Thine is the power and the glory for ever. Let grace come, and let this world pass away. Hosanna to the God (Son) of David! If any one is holy, let him come; if any one is not so, let him repent. Maran atha. Amen. […]

(ubi sup.) Let there not be therefore a Judas at the table of the Lord; this sacrifice is spiritual food, for as bodily food, working on a belly filled with humours which are opposed to it, is hurtful, so this spiritual food if taken by one polluted with wickedness, rather brings him to perdition, not by its own nature, but through the fault of the recipient. Let therefore our mind be pure in all things, and our thought pure, for that sacrifice is pure. There follows: And he said unto them, This is my blood of the New Testament, which is shed for many.