Quality is never an accident; it's the result of intention and effort.

I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.

当我21岁的时候我的期望降低到零。从那以后每件事情对我来说都是意外的礼物。

我们需要像看待识字和算术一样看待数字技能。

如果你独处时感到寂寞，这说明你没有和你自己成为好朋友。

意识到时间并不重要乃是智慧之门。

释义：水一旦泼出去，就收不回来，后悔也来不及。  

工具变量的美妙之处在于它们让我们以新的视角看世界。