小人反复无常，不可深交。  

创建和维持大型复杂组织的能力是区分成功社会与不成功社会的关键因素之一。

The opening up of new markets, foreign or domestic, and the organizational development from the craft shop and factory to such concerns as U.S. Steel illustrate the same process of industrial mutation—if I may use that biological term—that incessantly revolutionizes the economic structure from within, incessantly destroying the old one, incessantly creating a new one.

事情总是出乎意料！

人类行为是自然的一部分，可以通过自然科学的方法来研究。