Chapter — Billuart, Summa Summae · from Schola ThomisticaOn the Nature of SinEnglish · Latin · Both1.D. Thomas, IIa IIae, from q. 71 to q. 89.D. Thomas, IIa IIae, a q. 71 ad 89.SinWithin this chapterWhat is sin?Whether the formal constitutive of the sin of commission consists in something positive, or privative?On the sin of omission← On the properties of the virtuesWhat is sin? →