Every man has his secret sorrows which the world knows not; and often times we call a man cold when he is only sad.

行为法则可以从基本的生理原则中推导出来。

Simplicity is not the absence of complexity, but the resolution of it.

Adaptability is the currency of the modern business world.

在瞬息万变的全球市场中，适应性是最宝贵的特质。

译文：专门注重修养内心的人每天都会看到自己的不足，专门注重增长见识的人每天都会看到自己的长处。每天看到自己不足的人会逐渐变得有长处，每天看到自己有长处的人会逐渐变得有不足。