Your most unhappy customers are your greatest source of learning.

You are not only responsible for what you say, but also for what you do not say.

The only way to deal with the complexity of the world is to simplify it.

投资者最重要的决策是资产配置。

无产阶级，现今社会的最下层，如果不炸毁构成官方社会的整个上层，就不能抬起头来，挺起胸来。