一流智力的测试是同时在大脑中持有两种相反的想法，并且仍然保持运作能力。
The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.
The division of labour， so far as it can be introduced， occasions， in every art， a proportionable increase of the productive powers of labour.
每个人都有不为世人所知的秘密悲伤；我们常常称一个人冷漠，其实他只是悲伤。
城市是人类最伟大的发明。
林业的创新意味着在生态健康与经济可行性之间取得平衡。
The study of mind is the study of life's problem-solving.
