CATECHISM OF THE CATHOLIC CHURCH
SECOND EDITION

Paragraphs 1772–1776

1772 The principal passions are love and hatred, desire and fear, joy, sadness, and anger.
1773 In the passions, as movements of the sensitive appetite, there is neither moral good nor evil. But insofar as they engage reason and will, there is moral good or evil in them.
1774 Emotions and feelings can be taken up in the virtues or perverted by the vices.
1775 The perfection of the moral good consists in man's being moved to the good not only by his will but also by his "heart."
1776 "Deep within his conscience man discovers a law which he has not laid upon himself but which he must obey. Its voice, ever calling him to love and to do what is good and to avoid evil, sounds in his heart at the right moment. . . . For man has in his heart a law inscribed by God. . . . His conscience is man's most secret core and his sanctuary. There he is alone with God whose voice echoes in his depths."