Niels Bohr

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.

Anyone who is not shocked by quantum theory has not understood it.

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

Anyone who says that they can contemplate quantum mechanics without becoming dizzy has not understood the concept in the least.

Prediction is very difficult, especially about the future.

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

Of course I don't believe in it. But I understand that it brings you luck whether you believe in it or not.