The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

We are all searching for something, whether we admit it or not, and that search defines us.

Every problem in NP can be reduced to the satisfiability problem, which is the cornerstone of computational complexity theory.

这句话其实是莎士比亚借哈姆雷特之口说的，但是霍金非常喜欢，曾在自己著作中多次引用，所以很多人误以为本句话是霍金说的。

我不是那种会让对名声的爱减少的人。