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

We never are definitely right, we can only be sure we are wrong.

Physicists like to think that all you have to do is say, these are the conditions, now what happens next?

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.

I think it's much more interesting to live not knowing than to have answers which might be wrong.

It is simple, therefore it is beautiful

The first principle is that you must not fool yourself and you are the easiest person to fool.