Somebody once asked Niels Bohr why he had a horseshoe hanging above the front door of his house. "Surely you, a world famous physicist, can't really believe that hanging a horseshoe above your door brings you luck?". "Of course not," Bohr replied, "but I have been reliably informed that it will bring me luck whether I believe in it or not."
A physicist is an atom's way of knowing about atoms.
Physicists like to think that all you have to do is say, these are the conditions, now what happens next?
When I took office, only high energy physicists had ever heard of what is called the Worldwide Web.... Now even my cat has its own page.