Part — Merkelbach, Summa Theologiae MoralisFirst Part: On the Sacrament of Penance ItselfContentsQuestion One: On the Existence of the Sacrament of Penancenn. 419–430Article I: On the Existence of the Power of the Keysnn. 420–426Article II: On the Existence of the Sacrament Itselfnn. 427–430Question Two: On the Constitutive Elements of the Sacramentnn. 431–447Article I: On Remote Matternn. 432–436Article II: On Proximate Matternn. 437–440Article III: On the Formnn. 441–447Question Three: On the Institution, Necessity, and Iteration of the Sacrament of Penancenn. 448–451