心理学必须基于可观察的事实,而非推测。
A legal system is a system of rules which are valid according to the system's own criteria of validity.
创新不仅仅是创造新事物,更是要对人们的生活产生影响。
学得越多,越明白自己知之甚少。
想象力只是模仿,批判精神才能创造。
The most important political virtue is moderation.