Most human beings have an almost infinite capacity for taking things for granted. That men do not learn very much from the lessons of history is the most important of all the lessons of history.
大多数人都有一种近乎无限的能力，认为一切都是理所当然的。人不能从历史的教训中学到很多东西，这是所有历史教训中最重要的一条。