The beauty of mathematics only shows itself to more patient followers.

In one minute you can change your attitude and in that minute you can change your entire day.

光明在书中。把书完全打开，让它发光，让它发挥作用。

一个人独处要超脱，与别人共处要和蔼；没有事时享受闲适；有了事情要果断；得意时要显出淡泊，失意时要安然处之。