Some men accordingly, not paying heed to these things, have contended that Christ's body and blood are not in this sacrament except as in a sign, a thing to be rejected as heretical, since it is contrary to Christ's words. Hence Berengarius, who had been the first deviser of this heresy, was afterwards forced to withdraw his error, and to acknowledge the truth of the faith.
Reply Obj. 1: From this authority the aforesaid heretics have taken occasion to err from evilly understanding Augustine's words. For when Augustine says: "You are not to eat this body which you see," he means not to exclude the truth of Christ's body, but that it was not to be eaten in this species in which it was seen by them. And by the words: "It is a mystery that I put before you; in its spiritual sense it will quicken you," he intends not that the body of Christ is in this sacrament merely according to mystical signification, but "spiritually," that is, invisibly, and by the power of the spirit. Hence (Tract. xxvii), expounding John 6:64: "the flesh profiteth nothing," he says: "Yea, but as they understood it, for they understood that the flesh was to be eaten as it is divided piecemeal in a dead body, or as sold in the shambles, not as it is quickened by the spirit . . . Let the spirit draw nigh to the flesh . . . then the flesh profiteth very much: for if the flesh profiteth nothing, the Word had not been made flesh, that It might dwell among us."
Reply Obj. 2: That saying of Augustine and all others like it are to be understood of Christ's body as it is beheld in its proper species; according as our Lord Himself says (Matt. 26:11): "But Me you have not always." Nevertheless He is invisibly under the species of this sacrament, wherever this sacrament is performed.
Reply Obj. 3: Christ's body is not in this sacrament in the same way as a body is in a place, which by its dimensions is commensurate with the place; but in a special manner which is proper to this sacrament. Hence we say that Christ's body is upon many altars, not as in different places, but "sacramentally": and thereby we do not understand that Christ is there only as in a sign, although a sacrament is a kind of sign; but that Christ's body is here after a fashion proper to this sacrament, as stated above.
Reply Obj. 4: This argument holds good of Christ's bodily presence, as He is present after the manner of a body, that is, as it is in its visible appearance, but not as it is spiritually, that is, invisibly, after the manner and by the virtue of the spirit. Hence Augustine (Tract. xxvii in Joan.) says: "If thou hast understood" Christ's words spiritually concerning His flesh, "they are spirit and life to thee; if thou hast understood them carnally, they are also spirit and life, but not to thee." _______________________
SECOND ARTICLE [III, Q. 75, Art. 2]
Whether in This Sacrament the Substance of the Bread and Wine Remains
After the Consecration?
Objection 1: It seems that the substance of the bread and wine does remain in this sacrament after the consecration: because Damascene says (De Fide Orth. iv): "Since it is customary for men to eat bread and drink wine, God has wedded his Godhead to them, and made them His body and blood": and further on: "The bread of communication is not simple bread, but is united to the Godhead." But wedding together belongs to things actually existing. Therefore the bread and wine are at the same time, in this sacrament, with the body and the blood of Christ.
Obj. 2: Further, there ought to be conformity between the sacraments. But in the other sacraments the substance of the matter remains, like the substance of water in Baptism, and the substance of chrism in Confirmation. Therefore the substance of the bread and wine remains also in this sacrament.
Obj. 3: Further, bread and wine are made use of in this sacrament, inasmuch as they denote ecclesiastical unity, as "one bread is made from many grains and wine from many grapes," as Augustine says in his book on the Creed (Tract. xxvi in Joan.). But this belongs to the substance of bread and wine. Therefore, the substance of the bread and wine remains in this sacrament.