"Every word or concept, clear as it may seem to be, has only a limited range of applicability."

"When I meet God, I am going to ask him two questions: Why relativity? And why turbulence? I really believe he will have an answer for the first."

"I was forced to find a new way of expressing the fundamental laws of nature, one which would not rely on the outdated concepts of classical physics."

"The very act of observing changes the observed."

"The positivists have a simple solution: the world must be divided into that which we can say clearly and the rest, which we had better pass over in silence. But can anyone conceive of a more pointless…"