NP完全性不仅仅是一个理论上的好奇心；它对实际计算有着深远的影响。

"To be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others."

The truth about the world, he said, 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.

The only thing that separates successful people from the ones who aren't is the willingness to work hard.