Chapter 20 — Part II: The Sacraments — Extreme Unction
Section 16. This anointing cannot be supposed to have been invented by the Apostles, but was commanded by our Lord. Nor did its power arise from any natural virtue. Its efficacy, we must believe, was mystical, having been instituted to heal the maladies of the soul, rather than to cure the diseases of the body. This is the doctrine taught by St. Denis, St. Ambrose, St. Chrysostom and St. Gregory the Great; so that it cannot be at all doubted that Extreme Unction is to be recognised and venerated as one of the seven Sacraments of the Catholic Church.