Niels Bohr

“The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be transparency.”

“We are all agreed that your theory is crazy. The question that divides us is whether it is crazy enough.”

“Your theory is crazy, but it's not crazy enough to be true.”

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

“If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet.”

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

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

“Prediction is very difficult, especially 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.”

“An expert is a person who has made all the mistakes that can be made in a very narrow field.”