I'm alive and I have a chance to do something with my life. That's the only motivation I need.

爱是一种信仰，信仰不足的人也缺乏爱。

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

A gentleman is one who puts more into the world than he takes out.

我不记得活着的理由了，而我记得的时候，那个理由又没有说服力。

每个人心中都有一头野兽，当你给他一把剑或矛并送他上战场时，那头野兽就会苏醒。