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What men have called friendship is only a social arrangement, a mutual adjustment of interests, an interchange of services given and received; it is, in sum, simply a business from which those involved propose to derive a steady profit for their own self-love.

人们所说的友谊只不过是一种社会安排，一种利益的相互调整，一种给予和接受服务的交换;总之，这只是一个简单的业务，涉及的人建议从中获得稳定的利润，为自己的爱。

— Francois VI, Duc De La Rochefoucauld 弗朗索瓦六世，罗切福科公爵