Bohr, Niels (1885 – 1962), Danish physicist
Never express yourself more clearly than you are able to think.
Prediction is very difficult, especially about the future.
Your theory is crazy, but it’s not crazy enough to be true. (To a young physicist)
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.
