NP-completeness is not just a theoretical curiosity; it has profound implications for practical computing.

不去尝试办不到的事情, 不去追求得不到的东西, 不居于不能持久的地位, 不推行不可重复的政策。

大自然倾向于在她所有的作品中产生恒常性，但并不总是成功。

历史学家的任务是让死者重生。

The truth about the world is that anything is possible. Had you not seen it all from birth and thereby bled it of its strangeness it would appear to you for what it is. A hat trick in a medicine show. A fevered dream. A trance bepopulate with chimeras having neither analogue nor precedent. An itinerant carnival. A migratory tentshow whose ultimate destination after many a pitch in many a mudded field is unspeakable and calamitous beyond reckoning.

A book is a mirror: if an ass peers into it, you can't expect an apostle to look out.