“No, no, you're not thinking; you're just being logical.”

“Never express yourself more clearly than you are able to think”

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

“We are all agreed that your theory is crazy. The question which divides us is whether it is crazy enough to have a chance of being correct. My own feeling is that it is not crazy enough.”

“Every great and deep difficulty bears in itself it’s own solution. It forces us to change our thinking in order to find it.”

“There are some things so serious that you have to laugh at them.”

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