Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country.
我们都在阴沟里，但仍有人仰望星空。
The more you know, the more you realize you don't know.
你越是对自己的过去和现在负责，就越能创造你想要的未来。
Always be grateful for what you have.
I always tell my students that it's okay to make mistakes, as long as you learn from them.