Humanity takes itself too seriously. It is the world's original sin. If the caveman had known how to laugh, the world would have been different.
Source: In Webster's Electronic Quotebase, ed. Keith Mohler, 1994.
-- Oscar Wilde, (Oct 16 1856-1900), Anglo-Irish playwright, novelist; He was noted for his flamboyant witty, sophisticated plays, e.g., The Importance of Being Ernest, 1895.