The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt, and the profoundest wisdom to know when it ought to be resisted, and when it be obeyed.

I think the most important thing is to be true to yourself.

心理过程的功能是调解有机体的需求与环境的要求。

The stream of thought is a stream of survival.

Law is a system of rules, a union of primary rules of obligation and secondary rules of recognition, change, and adjudication.

合作是解决复杂挑战的关键。