A great biography is a kind of pilgrimage, walking in someone else’s footsteps while trying to understand their soul.

Every book is a journey, and every journey could become a book.

最好的故事是那些给你留下更多问题而不是答案的故事。

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。