All the time you're saying to yourself, 'I could do that, but I won't,'--which is just another way of saying that you can't.

What I can't create I don't understand

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

There is no learning without having to pose a question. And a question requires doubt.

Nature does not care what we call it, she just keeps on doing it.

I would rather have questions that can't be answered than answers that can't be questioned.

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