"In fighting a bull you're always aware of a paradox concerning your perceptions of the bull. On the one hand it's your perceptions of the bull that give you the upper hand. You read the bull, you learn to read the bull more and more accurately, and this reading of the bull is how you deploy your intelligence against the bull's intelligence. Your accuracy in reading the bull is a weapon, maybe your most important weapon, against all the bull's weapons. On the other hand, you're human, you have the human tendency to read into the bull things which may not actually be there."
