Don't go around saying the world owes you a living. The world owes you nothing. It was here first.

The world is a fine place and worth fighting for.

Don't let your past dictate who you are, but let it be a lesson that strengthens you.

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。

Stop helping God across the road like a little old lady.

戏剧是让不可见之物可见的艺术。