Ethics and mathematics

"Half of the world's problems would go away if people simply accepted that other people live by their own very different ethics."

"Oh really? I think there's something seriously wrong with you to be saying such an amoral principle."

"You see? Like I said. Half of the world's problems would go away if people simply accepted that other people live by their own very different ethics."

"The chess player gives away the queen to win the game, but the mathematician gives away the entire game." -- Someone whose name I don't remember.