Quote by Feynman, Richard
"Some people say, 'How do you know you're not crazy?' I don't know how to answer that."
More from Feynman, Richard
"The first principle is that you must not fool yourself – and you are the easiest person to fool."
"What I cannot create, I do not understand."
"The pleasure of finding things out is the pleasure of science."
"Nobody ever figures out what life is all about, and it doesn't matter. Explore the world. Nearly everything is really interesting if you go into it deeply enough."