Whatever failures I have known, whatever errors I have committed, whatever follies I have witnessed in private and public life have been the consequence of action without thought. – Bernard Baruch
In thinking, if a person begins with certainties, they shall end in doubts, but if they can begin with doubts, they will end in certainties. – Francis Bacon
It is impossible to overlook the extent to which civilization is built upon a renunciation of instinct. – Sigmund Freud, Civilization and Its Discontents