The joy of mathematics is in the struggle to understand.

In economics, the devil is often in the details.

I could easily forgive his pride, if he had not mortified mine.

不要看时钟；做时钟做的事。继续前进。

一个问题如果在计算机上可以快速解决，那么它属于P类问题；如果一个解可以快速验证，那么它属于NP类问题。

我对人类的状况和是什么让人们心动感兴趣。

To love is to risk not being loved in return. To hope is to risk pain. To try is to risk failure, but risk must be taken because the greatest hazard in life is to risk nothing.