It is wrong to think that the task of physics is to find out how Nature is. Physics concerns what we say about Nature.
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.
Niels Bohr
How wonderful that we have met with a paradox. Now we have some hope of making progress.
Niels Bohr
An expert is a person who has made all the mistakes that can be made in a very narrow field.
Niels Bohr
It is not the mountain we conquer, but ourselves.