Part — Koch–PreussPart I: The Duty of Internal WorshipContentsChapter I: FaithSection 1: Nature and Necessity of FaithSection 2: Duty and Extent of FaithSection 3: Qualities and Fruits of FaithSection 4: Sins Against FaithChapter II: HopeSection 1: Nature, Object, and Necessity of HopeSection 2: Qualities and Fruits of HopeSection 3: Sins Against HopeChapter III: CharitySection 1: Nature, Motive, and Object of CharitySection 2: Necessity of CharitySection 3: Fruits and Effects of CharitySection 4: Sins Against CharityChapter I: The Nature, Efficacy, and Object of PrayerChapter II: The Necessity of Prayer and the Duty of PrayingChapter III: The Qualities of PrayerChapter IV: Kinds of PrayerChapter V: Various Forms of PrayerChapter VI: The Sins Opposed to Prayer