Moral certainty is always a sign of cultural inferiority. The more uncivilized the man, the surer he is that he knows precisely what is right and what is wrong.
Source: In Pearls of Wisdom, ed. J. Agel and W. Glanze, 1987.
-- H L Mencken, (Sep 12 1880-1956), US editor, satirist; He is known for his biting satire, insults, and debunking in The American Mercury, 1924-33.