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

“How wonderful that we have met with a paradox. Now we have some hope of making progress.”

“Everything we call real is made of things that cannot be regarded as real.”

“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.”

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

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