There's a law of the Universe that every religion talks about, and it's one of a tiny number (2?) of social laws that are as inescapable as gravity. Eastern religions call it karma; Christians say "you reap as you sow". Before that, Jews said, "Do unto others as you would have them do unto you"*. As the gentlemen who returned the gun said,
Photo from the paper (obviously)...
* I know: same author. I'm tryin' to wax poetic here!