Work hard to find something that fascinates you.

I couldn't claim that I was smarter than sixty-five other guys--but the average of sixty-five other guys, certainly!

As usual, nature's imagination far surpasses our own, as we have seen from the other theories which are subtle and deep.

Science is of value because it can produce something.

People who wish to analyze nature without using mathematics must settle for a reduced understanding.

Ordinarily it would take me about fifteen minutes to get a hallucination going," wrote Feynman, "but on a few occasions, when I smoked some marijuana beforehand, it came very quickly.

We need to teach how doubt is not to be feared but welcomed. It's OK to say, "I don't know."