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

Love yourself first, because that’s who you’ll spend the rest of your life with.

"What is a hero without love for mankind?"

Close the door. Write with no one looking over your shoulder. Don't try to figure out what other people want to hear from you; figure out what you have to say. It's the one and only thing you have to offer.

To make mistakes is human. To own your mistakes is divine. Nothing elevates a person higher than quickly admitting and taking personal responsibility for the mistakes you make and then fixing them fairly. If you mess up， fess up. It’s astounding how powerful this ownership is.

成长就是意识到不是每个人都会理解你，这没关系。