自然界运行的规律就是，发展到尽头则走向反面，发展到极盛则走向衰落。

在交易的世界里，情绪是你最大的敌人。

写作是对抗遗忘的一种抵抗形式。

The truth is that we are all alone in the world.

There are two ways to extend a business. Take inventory of what you are good at and extend out from your skills. Or determine what your customers need and work backwards, even if it requires learning new skills.

心理学必须是一门观察的科学，而非推测。