"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 …"

"To every man is given the key to the gates of heaven; the same key opens the gates of hell."

"You know, the most amazing thing happened to me tonight... I saw the brightest star in the sky. And it was moving!"

"The thing about science is that it's all about discovery. It's all about trying to find out what's going on."

"The game of science is to understand the world."