Robert

“Our behavior is different. How often have you seen a headline like this?--TWO DIE ATTEMPTING RESCUE OF DROWNING CHILD. If a man gets lost in the mountains, hundreds will search and often two or three searchers are killed. But the next time somebody gets lost just as many volunteers turn out.
Poor arithmetic, but very human. It runs through all our folklore, all human religions, all our literature--a racial conviction that when one human needs rescue, others should not count the price.”
― Robert A. Heinlein, Starship Troopers

“I can calculate the motion of heavenly bodies but not the madness of people.”
― Isaac Newton

“He had discovered a great law of human action, without knowing it, namely, that, in order to make a man or a boy covet a thing, it is only necessary to make the thing difficult to attain.”
― Mark Twain

“If we could read the secret history of our enemies, we should find in each man's life sorrow and suffering enough to disarm all hostility.”
― Henry Wadsworth Longfellow, The Complete Works of Henry Wadsworth Longfellow