The greatest reward in our work is knowing we’ve made a difference.

不作恶。

The best way to learn mathematics is to do mathematics.

生活的艺术在于知道何时坚持，何时放手。

我相信，只要你站起来并前进，生活就会为你敞开大门。有些事情会激励你继续前进。

We are all characters in a story we did not write.

"Every man has his secret sorrows which the world knows not; and often times we call a man cold when he is only sad."