Chapter 18 — Part II: The Sacraments — The Holy Eucharist
Section 88. Presence In Virtue Of The Sacrament And In Virtue Of Concomitance — Pastors, however, should not fail to observe that in this Sacrament not all these things are contained after the same manner, or by the same power. Some things, we say, are present in virtue of the consecration; for as the words of consecration effect what they signify, sacred writers usually say that whatever the form expresses, is contained in the Sacrament by virtue of the Sacrament. Hence, could we suppose any one thing to be entirely separated from the rest, the Sacrament, they teach, would be found to contain solely what the form expresses and nothing more.