To understand behavior, we must look at its purpose in the context of survival and adaptation.

Happiness is secured through virtue； it is a good attained by man's own will.

领导力在于创造一个让人们能够发挥最佳水平的环境。

科学的美丽在于它通过观察和实验来解释自然世界的能力。

我不害怕采取不受欢迎的立场。

Laws, in their most general signification, are the necessary relations arising from the nature of things.