Chapter 18 — Part II: The Sacraments — The Holy Eucharist
Section 112. Proof From The Preceding Dogmas — What has been said in explanation of the two preceding points must facilitate for pastors the exposition of this truth. For, since we have already proved that the body and blood of our Lord are really and truly contained in the Sacrament, to the entire exclusion of the substance of the bread and wine, and since the accidents of bread and wine cannot inhere in the body and blood of Christ, it remains that, contrary to physical laws, they must subsist of themselves, inhering in no subject.