经济学中最重要的是理解预期的作用。

To accomplish great things, we must not only act, but also dream; not only plan, but also believe.

In the old world, you devoted 30% of your time to building a great service and 70% of your time to shouting about it. In the new world, that inverts.

Success is the best revenge.

让我们去创造明天，而不是为昨天担忧。