我们写作是为了记住，但也是为了忘记。

一个好的数学家是懒惰的，但是以一种建设性的方式。

I just treated people,when I was in a position of authority ,with compassion,understanding and love,that's basically what I've done in life.

To every action there is always opposed an equal reaction； or， the mutual actions of two bodies upon each other are always equal， and directed to contrary parts.

坚持是数学研究的关键，许多伟大的成果来自于长期的奋斗。