When asked ... [about] an underlying quantum world, Bohr would answer, 'There is no quantum world. There is only an abstract quantum physical description. It is wrong to think that the task of physics is to find out how nature is. Physics concerns what we can say about Nature.'
And anyone who thinks they can talk about quantum theory without feeling dizzy hasn't yet understood the first thing about it.
Address to Albert Einstein: You are not thinking. You are merely being logical.
If you think you understand it, that only shows that you don't know the first thing about it.
How wonderful that we have met with a paradox. Now we have some hope of making progress.
Never express yourself more clearly than you are able to think.
Every great and deep difficulty bears in itself its own solution. It forces us to change our thinking in order to find it.
No, no, you're not thinking; you're just being logical.
It is wrong to think that the task of physics is to find out how Nature is. Physics concerns what we say about Nature.