The night is a black dog that follows you home.

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.

要解决一个问题，首先必须理解它的本质，然后找到正确的工具来处理它。

一个人可以写在历史页册里的最高头衔就是他自己的名字。