Question III. Law

In the previous Question we considered the internal principles of human acts—that is, habits, good and bad, from which they proceed. Now we shall turn to the external principles, good and bad, that move one to one’s acts. The external principle that moves to evil is the demon, who tempts us to sin; the external principle that moves to good is God, who instructs us by His law and helps us by His grace to fulfill it. Temptation has been discussed already, and grace belongs to Dogmatic Theology; the next Question to be considered, therefore, is Law.