Mathematics is the most beautiful and most powerful creation of the human spirit.

The only freedom which deserves the name is that of pursuing our own good in our own way， so long as we do not attempt to deprive others of theirs， or impede their efforts to obtain it.

永远不要停止相信自己。

商业成功可以成为艺术的一种形式。

自由的概念与真理的概念不可分割。