没有人是有极限的。

人类行为是进化心理机制的产物，这些机制处理来自环境的信息。

Failure gave me an inner security that I had never attained by passing examinations. Failure taught me things about myself that I could have learned no other way. I discovered that I had a strong will, and more discipline than I had suspected; I also found out that I had friends whose value was truly above the price of rubies.

我们根据世界对生存的效用性来感知它。

学习计算机科学的最好方法就是去做计算机科学。

Ask not what your country can do for you --ask what you can do for your country.

数学是神与人类交谈的语言。