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

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

“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.”

“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.”

“The meaning of life consists in the fact that it makes no sense to say that life has no meaning.”

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