【译文】 孔子说：“生来就知道的，是上等人；学习后才知道的，是二等人；遇到困难才学习的，是三等人；遇到困难也不学习的，这就是下等人了。”

No matter how complex or refined, all behavior is to be explained in terms of stimulus and response.

In the state of nature, indeed, all men are born equal, but they cannot continue in this equality. Society makes them lose it, and they recover it only by the protection of the laws.

Every building tells a story, and it is the architect's job to make sure it is a good one.

社会学的想象力使我们能够把握历史和传记以及两者在社会中的关系。