The best advice I ever received was to stay true to myself and never compromise my integrity.

Love is not enough. It has to be tended, like a fire.

学习数学的唯一方法就是做数学。

I'm not a feeling, I'm a thought.

"When you do something best in life, you don’t really want to give that up – and for me it’s tennis."

如果你活着，你就得挥舞胳膊腿，上蹿下跳，制造噪音，因为生命与死亡截然相反。