史记

All the texts say that in order to gain release one should render the mind quiescent; therefore their conclusive teaching is that the mind should be rendered quiescent; once this has been understood there is no need for endless reading.

一个问题如果在计算机上可以快速解决，那么它属于P类问题；如果一个解可以快速验证，那么它属于NP类问题。

世界上充满了显而易见的事物，却没有人注意到它们。