Chapter 16 — Part II: The Sacraments — Baptism
Section 12. Constituent Elements Of Baptism — But define Baptism as we may, the faithful are to be informed that this Sacrament consists of ablution, accompanied necessarily, according to the institution of our Lord, by certain solemn words. This is the uniform doctrine of the holy Fathers, as is proved by the following most explicit testimony of St. Augustine: The word is joined to the element, and it becomes a Sacrament.