——《在广州商团及警察联欢会的演说》（1924年1月14日）

The scientific study of behavior must be based on objective, measurable data.

We've done price elasticity studies, and the answer is always that we should raise prices. We don't do that, because we believe -- and we have to take this as an article of faith -- that by keeping our prices very, very low, we earn trust with customers over time, and that that actually does maximize free cash flow over the long term.

成功不是幸福的关键。幸福才是成功的关键。如果你热爱你所做的事情，你就会成功。