无限的概念不仅仅是一个数学抽象，而是一个物理现实。

You have to be willing to take risks, because the biggest risk is not taking any.

To understand behavior, look for the utility in it.

The painter must give a completely accurate account of their experience of looking at the subject.

Leadership means making tough decisions today that will benefit future generations.

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.