I think that the most important thing in art is to provoke thought, not to provide entertainment.

表达人生短暂，我们都是匆匆过客的感慨。

The reason why men enter into society is the preservation of their property.

做数学就是同时参与创造和发现的行为。

质量从来不是偶然的，它始终是智慧努力的结果。