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.

The beauty of mathematics lies in its ability to describe the universe in the simplest terms.

幸福只是将灵魂从不幸福的动荡中解放出来。

INDUSTRY. Lose no time; be always employ’d in something useful; cut off all unnecessary actions.

写作就是一场漫长的自我教育。