Einstein, stop telling God what to do!

A physicist visits a colleague and notices a horseshoe hanging on the wall above the entrance. 'Do you really believe that a horseshoe brings luck?' he asks. 'No,' replies the colleague, 'but I've been told that it works even if you don't believe in it.'

And anyone who thinks they can talk about quantum theory without feeling dizzy hasn't yet understood the first thing about it.

Anyone who can contemplate quantum mechanics without getting dizzy hasn't understood it.

In the great drama of existence we are audience and actors at the same time.

You must come to Copenhagen to work with us. We like people who can actually perform thought experiments!

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.'