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.

All mass is interaction.

I think Nature's imagination is so much greater than man's, she's never gonna let us relax!

Science is a process for learning about nature in which competing ideas about how the world works are measured against observations.

Some people think Wheeler's gotten crazy in his later years, but he's always been crazy.

One of the ways of stopping science would be only to do experiments in the region where you know the law. But experimenters search most diligently, and with the greatest effort, in exactly those places where it seems most likely that we can prove our theories wrong. In other words, we are trying to prove ourselves wrong as quickly as possible, because only in that way can we find progress.

I have a limited intelligence and I've used it in a particular direction.