Contrary to one of the paradoxes of the Stoics, refuted also in Sum. Theol., 1a-2ae, q. 73, art. 2 (Aquinas Ethicus, I, 211, 212). The text, James ii, 10, may refer to the breaking of even one commandment contumaciously and contemptuously. Now there is a certain contumaciousness in every mortal sin; and one such sin is enough to destroy sanctity and supernatural righteousness; cf. Ezechiel xxviii, 12, 13.
Of God and His Creatures: 3.140