"The right word may be effective, but no word was ever as effective as a rightly timed pause."

"The fact that man knows right from wrong proves his intellectual superiority to other creatures; but the fact that he can do wrong proves his moral inferiority to any creature that cannot."

"By trying, we can endure adversity. Another man's, I mean."

"I have never let my schooling interfere with my education."

"Don't go around saying the world owes you a living. The world owes you nothing. It was here first."

"I never could tell a lie that anybody would doubt, nor a truth that anybody would believe."

"Unless you are ambitious, you do not make progress."

"The only tyrant I accept in this world is the still voice within."

"Results are what you expect, and consequences are what you get."

"The definition of genius is that it acts unconsciously; and those who have produced immortal works, have done so without knowing how or why. The greatest power operates unseen."

"PHILANTHROPIST, n. A rich (and usually bald) old gentleman who has trained himself to grin while his conscience is picking his pocket."

"Make it a rule of life never to regret and never to look back. Regret is an appalling waste of energy; you can't build on it; it's only for wallowing in."