| 1757 The object, the intention, and the circumstances make up the three "sources" of the morality of human acts. |
| 1758 The object chosen morally specifies the act of willing accordingly as reason recognizes and judges it good or evil. |
| 1759 "An evil action cannot be justified by reference to a good intention" (cf. St. Thomas Aquinas, Dec. praec. 6). The end does not justify the means. |
| 1760 A morally good act requires the goodness of its object, of its end, and of its circumstances together. |
| 1761 There are concrete acts that it is always wrong to choose, because their choice entails a disorder of the will, i.e., a moral evil. One may not do evil so that good may result from it. |