我认为最好的学习方法就是实践。
I think the best way to learn is by doing.
The melancholy science from which I make this offering to my friend relates to a region that from time immemorial was regarded as the true field of philosophy, but which, since the latter's conversion into method, has lapsed into intellectual neglect, sententious whimsy, and finally oblivion.
国家是人类社会中最重要的机构，因为它是唯一可以合法使用武力来维持秩序的机构。