Mohammad Ali

“All courses of action are risky, so prudence is not in avoiding danger (it's impossible), but calculating risk and acting decisively. Make mistakes of ambition and not mistakes of sloth. Develop the strength to do bold things, not the strength to suffer.”
― Niccolo Machiavelli

“it is much safer to be feared than loved because ...love is preserved by the link of obligation which, owing to the baseness of men, is broken at every opportunity for their advantage; but fear preserves you by a dread of punishment which never fails.”
― Niccolo Machiavelli, The Prince

“If an injury has to be done to a man it should be so severe that his vengeance need not be feared.”
― Niccolo Machiavelli, The Prince

“Never let your sense of morals prevent you from doing what is right.”
― Isaac Asimov, Foundation