The more you live, the more you learn. The more you learn, the more you realize how little you know.

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.

领导力意味着在今天做出艰难的决定，这些决定将在明天转化为机会。