Failure isn’t a necessary evil. In fact, it isn’t evil at all. It is a necessary consequence of doing something new.

我是一个非常私密的人。我不喜欢谈论我的个人生活。

Freedom is not something that anybody can be given. Freedom is something people take, and people are as free as they want to be.

数学研究是所有智力和精神进步不可或缺的基础。