You must come to Copenhagen to work with us. We like people who can actually perform thought experiments!
Niels BohrIf anybody says he can think about quantum physics without getting giddy, that only shows he has not understood the first thing about them.
Niels BohrA 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.'
Niels Bohr