"Tennis has given me everything, and I want to give something back."
我们必须设计本质上是恢复性和再生性的系统。
Happiness is not something ready made. It comes from your own actions.
It is best to act with confidence, no matter how little right you have to it.
译文:精神、道德、言语、行动,大致上以收敛为主,发散是不得已而为之,天地间的人和事物都是这样。