你不能让过去的错误阻碍你未来的进步。
计算复杂性的研究不仅仅是关于问题的分类;它是关于理解计算本身的本质。
The past is a cupboard full of light and all you have to do is find the key that opens the door.
It is one thing to show a man that he is in an error, and another to put him in possession of truth.