“You must follow me carefully. I shall have to controvert one or two ideas that are almost universally accepted. The geometry, for instance, they taught you at school is founded on a misconception.”

“You shall only have foes to be hated; but not foes to be despised: you must be proud of your foes. Thus have I already taught.”

“Life has taught me that to fly, you must first accept the possibility of falling.”

“Crying is almost totally avoidable if you follow two simple rules: 1. Don't care too much. 2. Shut up.”

“Also, I feel that crying is almost--like, aside from deaths of relatives or whatever-- totally avoidable if you follow two very simple rules: 1.Don't care too much. 2. Shut up. Everything unfortunate that has ever happened to me has stemmed from failure to follow one of the rules.”

“Tennis taught me so many lessons in life. One of the things it taught me is that every ball that comes to me, I have to make a decision. I have to accept responsibility for the consequences every time I hit a ball.”