“For action, whatever its immediate purpose, also implies relief at doing something, anything, and the joy of exertion. This is the optimism that is inherent in, and proper and indispensable to action, for without it nothing would ever be undertaken. It in no way suppresses the critical sense or clouds the judgment. On the contrary this optimism sharpens the wits, it creates a certain perspective and, at the last moment, lets in a ray of perpendicular light which illuminates all one's previous calculations, cuts and shuffles them and deals you the card of success, the winning number.”