"There is no way to learn anything, except by making mistakes."

"I was brought up to believe that the only way to really understand something is to build it."

"I'm not interested in being a guru. I'm interested in understanding the world."

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

"I'm a great believer in the idea that if you don't understand something, you should try to explain it to someone else."