If you think you understand it, that only shows that you don't know the first thing about it.

Truth is something that we can attempt to doubt, and then perhaps, after much exertion, discover that part of the doubt is not justified.

If you have a correct statement, then the opposite of a correct statement is of course an incorrect statement, a wrong statement. But when you have a deep truth, then the opposite of a deep truth may again be a deep truth.

There are trivial truths and the great truths. The opposite of a trivial truth is plainly false. The opposite of a great truth is also true.

Never express yourself more clearly than you are able to think.

A physicist is just an atom's way of looking at itself.

You must come to Copenhagen to work with us. We like people who can actually perform thought experiments!