自然实验可以为经济问题提供有价值的见解。
Natural experiments can provide valuable insights into economic questions.
One of my primary objects is to form the tools so the tools themselves shall fashion the work and give to every part its just proportion.
On pricing: "There are two kinds of companies， those that work to try to charge more and those that work to charge less. We will be the second."
The true measure of success is the positive impact you have on others.