Let us try to teach generosity and altruism, because we are born selfish.

"Silence is the language of the oppressed."

The past is not for living in; it is a well of conclusions from which we draw in order to act.

A man who dares to waste one hour of time has not discovered the value of life.

语言是存在之家，人在其中栖居。

数学是一门艺术，作为艺术家，你必须对自己诚实。