"One should forgive one's enemies, but not before they are hanged."

"Experience is a good school, but the fees are high."

"Be entirely tolerant or not at all; follow the good path or the evil one. To stand at the crossroads requires more strength than you possess."

"Ordinarily he was insane, but he had lucid moments when he was merely stupid."

"Dieu me pardonnera. C'est son metier. (God will forgive me. It's his job.)"

"The Romans would never have found time to conquer the world if they had been obliged first to learn Latin."

"If you are distressed by anything external, the pain is not due to the thing itself but to your own estimate of it; and this you have the power to revoke at any moment."

"There are sadistic scientists who hurry to hunt down errors instead of establishing the truth."

"It is mathematics that offers the exact natural sciences a certain measure of security which, without mathematics, they could not attain."

"What is life? An illusion, a shadow, a story, And the greatest good is little enough: for all life is a dream, and dreams themselves are only dreams."

"I'm not judging people, I'm judging their actions. It's the same type of distinction that I try to apply to myself, to judge, but not be judgmental."

"Humor is a rubber sword--it allows you to make a point without drawing blood."