"One should as a rule respect public opinion in so far as is necessary to avoid starvation and to prevent oneself from being cast into prison, but anything that goes beyond this is voluntary submission to an unnecessary tyranny."
"An expert is a person who has made all the mistakes that can be made in his field."
"Prediction is very difficult, especially if it's about the future."
"The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth."
"If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet."