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

“The very nature of the quantum theory ... forces us to regard the space-time coordination and the claim of causality, the union of which characterizes the classical theories, as complementary but exclusive features of the description, symbolizing the idealization of observation and description, respectively.”

“It is the hallmark of any deep truth that its negation is also a deep truth”

“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.”

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

“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.”

“You can recognize a small truth because its opposite is a falsehood. The opposite of a great truth is another truth.”