Every drop of oil should be used efficiently and responsibly.

On marketing: "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."

I believe that we are lost here in America, but I believe we shall be found.

Never underestimate the power of a farmer’s intuition—it’s built on experience.

孩子们从来都不太擅长听长辈的话，但他们从未停止模仿长辈。

In computational complexity, we are not just dealing with the limits of what we can compute, but also with the limits of what we can prove.