我已经履行了我的职责。我证明了庞加莱猜想，我在数学上没有什么可做的了。
I have already carried out my duty. I have proved the Poincaré conjecture and I have nothing more to do in mathematics.
Learning is not just about finding patterns, but about understanding the underlying mechanisms that generate those patterns.
To be happy is to be able to become aware of oneself without fright.
"The act of writing is an act of courage, a defiance against the silence of the world."
学无止境者比无所不知者做得更好。
The foundation of national morality must be laid in private families.