All are lunatics, but he who can analyze his delusions is called a philosopher.

Coward: One who, in a perilous emergency, thinks with his legs.

A person who doubts himself is like a man who would enlist in the ranks of his enemies and bear arms against himself. He makes his failure certain by himself being the first person to be convinced of it.

Genealogy, n. An account of one's descent from a man who did not particularly care to trace his own.

Clairvoyant, n.: A person, commonly a woman, who has the power of seeing that which is invisible to her patron - namely, that he is a blockhead.

CARTESIAN, adj. Relating to Descartes, a famous philosopher, author of the celebrated dictum, _Cogito ergo sum_ --whereby he was pleased to suppose he demonstrated the reality of human existence. The dictum might be improved, however, thus: _Cogito cogito ergo cogito sum_ --"I think that I think, therefore I think that I am;" as close an approach to certainty as any philosopher has yet made.