1 Corinthians 11:26-27
As often as you shall eat this Bread and drink the Chalice, you shall show the death of the Lord until He come: therefore whosoever shall eat this Bread or drink the Chalice of the Lord unworthily, shall be guilty of the Body and Blood of the Lord. Allelluia.
Haydock
Verse 27. Or drink. Here erroneous translators corrupted the text, by putting and drink (contrary to the original, h pinh) instead of or drink. — Guilty of the body, &c. not discerning the body, &c. This demonstrates the real presence of the body and blood of Christ, even to the unworthy communicant; who otherwise could not be guilty of the body and blood of Christ, or justly condemned for not discerning the Lord’s body. Ch. — The real presence in the sacrament is also proved by the enormity of the crime, in its profanation. See S. Chrys. hom. de non contem. ec. and hom. lx. and lxi. ad pop. Antioch. where he shews that the unworthy receiver imitates the Jews in crucifying Jesus, and trampling under foot his sacred blood. Hence the dreadful punishments we read of in verses 27 and 30.
Denzinger
875: The Reason for the Institution of this Most Holy Sacrament
JULIUS III 1550-1555 COUNCIL OF TRENT SESSION XIII (Oct. II, 1551) Decree On the Most Holy Eucharist Chap. 2. The Reason for the Institution of this Most Holy Sacrament
Our Savior, therefore, when about to depart from this world to the Father, instituted this sacrament in which He poured forth, as it were, the riches of His divine love for men, “making a remembrance of his wonderful works” [Ps. 110:4], and He commanded us in the consuming of it to cherish His “memory” [1 Cor. 11:24], and “to show forth his death until He come” to judge the world [1 Cor. 11:23]. But He wished that this sacrament be received as the spiritual food of souls [Matt. 26:26], by which they may be nourished and strengthened [can. 5], living by the life of Him who said: “He who eateth me, the same also shall live by me” [John 6:58], and as an antidote, whereby we may be freed from daily faults and be preserved from mortal sins. He wished, furthermore, that this be a pledge of our future glory and of everlasting happiness, and thus be a symbol of that one “body” of which He Himself is the “head” [1 Cor. 11:23; Eph. 5:23], and to which He wished us to be united, as members, by the closest bond of faith, hope, and charity, that we might “all speak the same thing and there might be no schisms among us” [cf. 1 Cor. 1:10].