If [quantum theory] is correct, it signifies the end of physics as a science.
How can it be that mathematics, being after all a product of human thought which is independent of experience, is so admirably appropriate to the objects of reality?
(Reply on what constitutes scientific proof:)"The question is much too difficult for me.
In my experience, the best creative work is never done when one is unhappy.
I'm not a genius. I'm just passionately curious.
The more a country makes military weapons, the more insecure it becomes: if you have weapons, you become a target for attack.