Tommy Lasorda, the onetime Los Angeles Dodgers manager, used to say that managing players was like holding a bird in your hands: grip it too firmly and you crush it, too loosely and it escapes and flies away. In the life of thought, holding a position is like that: there’s a proper firmness of belief that lies between the extremes of rigidity and flaccidity. We don’t want to be paralyzed by indecision or indifference, but like the apocryphal Keynes, we want to have the mental flexibility and honesty to adjust our views accordingly when the facts change.*2
