你不能只问顾客要什么，然后想法子给他们做什么。等你做出来，他们已经另有新欢了。
唯一的限制是你给自己设定的限制。
The only thing worse than being talked about is not being talked about.
解释：能吞下船的大鱼，不会在细浅的溪水里遨游；在天空高飞的鸿鹄，不会在肮脏的水池栖息。
Psychology must be based on direct experience and introspection.
The idea of justice is not the same as the idea of law.