释义：不能因为暂时的得意就自夸能力出众；也不能因为暂时的失意就丧失自己的志向。

Happiness is the very nature of the self; happiness and the self are not different. There is no happiness in any object of the world. We imagine through our ignorance that we derive happiness from objects.

NP完全性的概念为理解计算问题的复杂性提供了一个强大的工具。

The good things are not dead.