Richard Feynman — "I'd hate to die twice. It's so boring."

"I got a dollar for my patent! I give it to everybody. Result: everybody who has one of these patent because it was easy a lot of people had been sending things in lots of patents. Everybody come down …"

"I would rather have a world with five billion people that didn't know how to read than a world with five billion people that all knew how to read and all thought the same thing."

"It's a great thing to be able to say, 'I don't know.'"

"The thing that bothers me is that I can tell that the students don't understand. They are taught to remember things, but they don't understand."

"Scientific knowledge is a body of statements of varying degrees of certainty—some most unsure, some nearly sure, but none absolutely certain."