最好的数学是永恒的。

Man is born free， and everywhere he is in chains.

写作是为无形的东西赋予形状。

道理明白了，文辞就能表达清楚；文辞表达清楚了，道理也就明白了。

I’ve never been afraid of death. It’s the process of dying that worries me.

我是我自己的实验，我是我自己的艺术品。

Your self-worth is determined by you. You don't have to depend on someone telling you who you are.

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

你唯一应该努力超越的人就是昨天的自己。