How wonderful that we have met with a paradox. Now we have some hope of making progress.
– Niels Bohr
If anybody says he can think about quantum physics without getting giddy, that only shows he has not understood the first thing about them.
– Niels Bohr
If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet.
– Niels Bohr
Never express yourself more clearly than you are able to think.
– Niels Bohr
No, no, you're not thinking; you're just being logical.
– Niels Bohr
Prediction is very difficult, especially if it's about the future.
– Niels Bohr
There are some things so serious you have to laugh at them.
– Niels Bohr
There are trivial truths and the great truths. The opposite of a trivial truth is plainly false. The opposite of a great truth is also true.
– Niels Bohr
Your theory is crazy, but it's not crazy enough to be true.
– Niels Bohr
An expert is a person who has made all the mistakes that can be made in a very narrow field.
– Niels Bohr
When it comes to atoms, language can be used only as in poetry. The poet, too, is not nearly so concerned with describing facts as with creating images.
– Niels Bohr
The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be the weapon of openness.
– Niels Bohr
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
Every great and deep difficulty bears in itself its own solution. It forces us to change our thinking in order to find it.