Chapter 15 — Part II: The Sacraments — Introduction on the Sacraments in General
Section 16. Signs Instituted By God — Besides the signs instituted by the will and agreement of men, of which we have been speaking so far, there are certain other signs appointed by God. These latter, as all admit, are not all of the same kind. Some were instituted by God to indicate something or to bring back its recollection. Such were the purifications of the Law, the unleavened bread, and many other things which belonged to the ceremonies of the Mosaic worship. But God has appointed other signs with power not only to signify, but also to accomplish (what they signify).