- 1776 – “Deep within his conscience man discovers a law which he has not laid upon himself but which he must obey. Its voice… sounds in his heart at the right moment… For man has in his heart a law inscribed by God.”
- 1779 – “Return to your conscience, question it… Turn inward, brethren, and in everything you do, see God as your witness.” (St. Augustine)
- 1795 – “Conscience is man’s most secret core, and his sanctuary. There he is alone with God whose voice echoes in his depths.” (Gaudium et spes 16)



