过去总是紧张的，未来是完美的。

我不会让消极情绪偷走我的快乐。

People believe in God because the world is very complicated and they think it is very unlikely that anything as complicated as a flying squirrel or the human eye or a brain could happen by chance.

生命可以归结为一种简单的选择：要么忙于生存，要么赶着去死。

聪明的人戒太明察，刚强的人戒太暴躁，温和的人戒优柔寡断。

追求数学知识是一段永无止境的旅程。

一个民族的活力随天气而变化。

The challenge in computer science is to bridge the gap between the theoretical models and practical applications.