亲属关系的研究，即我们所谓的人类社会的社会解剖学的研究。

The human being is the only animal that thinks about the future.

The young do not know enough to be prudent, and therefore they attempt the impossible, and achieve it, generation after generation.

孤寂能产生独创精神，酝酿出一种敢作敢为、令人震惊的美丽的创作，也就是诗。但孤寂也会促成相反的东西，会养成人们不近人情、荒唐怪癖的性格，也会使人萌生非法之念。