"Man is a credulous animal, and must believe something; in the absence of good grounds for belief, he will be satisfied with bad ones."

"Not to be absolutely certain is, I think, one of the essential things in rationality."

"It is a waste of energy to be angry with a man who behaves badly, just as it is to be angry with a car that won't go."

"The good life, as I conceive it, is a happy life. I do not mean that if you are good you will be happy - I mean that if you are happy you will be good."

"Our great democracies still tend to think that a stupid man is more likely to be honest than a clever man."

"Freedom of opinion can only exist when the government thinks itself secure."

"If a man defrauds you one time, he is a rascal; if he does it twice, you are a fool."

"'Virtual Reality' is a name being slapped on almost anything these days, especially if it's lame."

"How far that little candle throws his beams! So shines a good deed in a naughty world."

"I am only one, but still I am one. I cannot do everything, but still I can do something; and because I cannot do everything, I will not refuse to do something I can do."

"Shut out all of your past except that which will help you weather your tomorrows."

"Only if we understand, will we care. Only if we care, will we help. Only if we help shall all be saved."