数学家是能在定理间找到类比的人；更好的数学家能在理论间看到类比；而最优秀的数学家能注意到类比之间的类比。
A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between theories and the best mathematician can notice analogies between analogies.
荒野是一个极端的地方。要生存，你必须接受高潮和低谷。
我已经失去我的生命中不死的一部分，留下来的也就跟畜生没有分别了。
Everyone has a secret world inside of them. All of the people of the world, I mean. Everybody. No matter how dull and boring they are on the outside, inside them they've all got unimaginable, magnificent, wonderful, stupid, amazing worlds. Not just one world. Hundreds of them.
The P versus NP problem is one of the most important unsolved problems in computer science.
过去半个世纪最重要的政治发展是自由民主在世界范围内的传播。