The challenge in theoretical computer science is not just to solve problems, but to understand the nature of problem-solving itself.

Tell your heart that the fear of suffering is worse than the suffering itself. And that no heart has ever suffered when it goes in search of its dreams, because every second of the search is a second's encounter with God and with eternity.

我从不放弃。我从不屈服。

Power resides where men believe it resides. It's a trick, a shadow on the wall. 

A healthy forest means a healthy economy; the two are inseparable.

过去从未消逝，它甚至还未过去。

我不知道第三次世界大战会用哪些武器，但第四次世界大战中人们肯定用的是木棍和石块。

"The magic of books is that they can take you anywhere."