To write is to give voice to the silent.

I have already carried out my duty. I have proved the Poincaré conjecture and I have nothing more to do in mathematics.

即使我输了，我也能从中学到东西。

Do what you can wherever you are， from wherever you sit in life. Give me your time or your talent your money if you have it.

You cannot not know history.

生活是一段旅程，而不是一个目的地。

You have to be able to admit when you're wrong and move on.

I'm not going to sit here and say I'm a role model, because I'm not trying to be.