"I don't know what's the matter with people: they don't learn by understanding; they learn by some other way — by rote or something. Their knowledge is so fragile!"

"I was talking to a guy who was a philosopher, and he said, 'But you're just describing the world, you're not explaining it.' And I said, 'Yeah, that's what science is. We describe it. We don't explain…"

"When I was in high school, I'd read about the great scientists and I was ashamed that I was not a great scientist. I used to think, 'What's the matter with me? I'm not a great scientist.'"

"I was once in a situation where I was giving a lecture, and I had some equations on the board. A guy in the audience stood up and said, 'Professor Feynman, your equations are wrong!' I looked at them …"

"The thing about science is that it's all about trying to prove yourself wrong."