The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.

"The essence of mathematics lies in its freedom."

The arithmetic of algebraic groups is a central theme in the Langlands program.

The only way to truly understand something is to do it yourself.

制造工艺的每一个纳米进步，背后都是无数工程师的心血。