Luke 22:19

(Moral. Reg. 21. c. 3. Reg. Brev. ad int. 172.) Learn then in what manner you ought to eat the Body of Christ, namely, in remembrance of Christ's obedience even unto death, that they who live may no more live in themselves, but in Him who died for them, and rose again. (2 Cor. 5:15.)

(Orat. de Bapt. Christ.) For the bread before the consecration is common bread, but when the mystery has consecrated it, it is, and it is called, the Body of Christ.

(Hom. 46. in Joan.) Christ did this to bring us to a closer bond of friendship, and to betoken His love toward us, giving Himself to those who desire Him, not only to behold Him, but also to handle Him, to eat Him, to embrace Him with the fulness of their whole heart. Therefore as lions breathing fire do we depart from that table, rendered objects of terror to the devil. (Hom. 46. in Joan.) For this Blood moulds in us a royal image, it suffers not our nobleness of soul to waste away, moreover it refreshes the soul, and inspires it with great virtue. This Blood puts to flight the devils, summons angels, and the Lord of angels. This Blood poured forth washed the world, and made heaven open. They that partake of it are built up with heavenly virtues, and arrayed in the royal robes of Christ; yea rather clothed upon by the King Himself. And since if thou comest clean, thou comest healthfully; so if polluted by an evil conscience, thou comest to thy own destruction, to pain and torment. For if they who defile the imperial purple are smitten with the same punishment as those who tear it asunder, it is not unreasonable that they who with an unclean heart receive Christ should be beaten with the same stripes as they were who pierced Him with nails.

(de Con. Ev. lib. iii. c. 1.) Or because Luke has twice mentioned the cup, first before Christ gave the bread, then after He had given it, on the first occasion he has anticipated, as he frequently does, but on the second that which he has placed in its natural order, he had made no mention of before. But both joined together make the same sense which we find in the others, that is, Matthew and Mark.

(in Luc.) Nor doubt that this is true; for He plainly says, This is my body; but rather receive the words of thy Saviour in faith. For since He is the Truth, He lies not. (Ep. ad Calosyr.). a They rave foolishly then who say that the mystical blessing loses its power of sanctifying, if any remains are left till the following day. For the most holy Body of Christ will not be changed, but the power of blessing and the life-giving grace is ever abiding in it. (in Luc. ut sup.). For the life-giving power of God the Father is the only-begotten Word, which was made flesh not ceasing to be the Word, but making the flesh life-giving. What then? since we have in us the life of God, the Word of God dwelling in us, will our body be life-giving? But it is one thing for us by the habit of participation to have in ourselves the Son of God, another for Himself to have been made flesh, that is, to have made the body which He took from the pure Virgin His own Body. He must needs then be in a certain manner united to our bodies by His holy Body and precious Blood, which we have received for a life-giving blessing in the bread and wine. For lest we should be shocked, seeing the Flesh and Blood placed on the holy altars, God, in compassion to our infirmities, pours into the offerings the power of life, changing them into the reality of His own flesh, that the body of life may be found in us, as it were a certain life-giving seed. He adds. Do this in commemoration of me.