The highest form of ignorance is when you reject something you don't know anything about.

不要害怕失败，因为每一次失败都是成功的练习。

The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.

2015年：贝索斯致股东信《全世界对失败最宽容的公司》

我总是在寻找改进的方法。