We want to build technology that everybody loves using, and that affects everyone. We want to create beautiful, intuitive services and technologies that are so incredibly useful that people use them twice a day. Like they use a toothbrush. There aren’t that many things people use twice a day.

我们必须建设天生绿色的网络，而不仅仅是改造为绿色。

A book is a version of the world. If you do not like it, ignore it; or offer your own version in return.

The best way to learn econometrics is by doing—working with real data and real problems.

文学是个人与普遍之间的桥梁，将个人经验与集体人类状况连接起来。

Ignoring isn’t the same as ignorance, you have to work at it.