Chapter 19 — Part II: The Sacraments — Penance
Section 142. Elements Of Sacramental Satisfaction — This, however, does not belong to Penance as a Sacrament. Only that satisfaction constitutes part of the Sacrament which, as we have already said, is offered to God for sins at the command of the priest. Furthermore, it must be accompanied by a deliberate and firm purpose carefully to avoid sin for the future.