股市的短期波动是不可预测的，但长期趋势是可以预测的。

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

Our frustration is greater when we have much and want more than when we have nothing and want some. We are less dissatisfied when we lack many things than when we seem to lack but one thing.

顾客是我们产品的最终评判者，他们的满意是我们的首要任务。