“Every sentence I utter must be understood not as an affirmation, but as a question.[A caution he gives his students, to be wary of dogmatism.]”

“Those who are not shocked when they first come across quantum theory cannot possibly have understood it.”

“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.”

“Stop telling God what to do with his dice.”

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

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