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The hardest thing to explain is the glaringly evident which everybody had decided not to see.
The wild is a place of danger. To survive, you have to respect it.
Products should be like water, adapting to the needs of different users.
The beauty of mathematics is that it is both an art and a science.
出自《海国图志》。圣人把天下当作一家,四海的人都是兄弟,所以对远方的人采取怀柔政策,以宾客的礼仪对待外国,这是王者的大度;普遍了解边塞民族的风俗,广泛博览全球风貌,这是智慧之人的远见卓识。