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Mankind have a great aversion to intellectual labor; but even supposing knowledge to be easily attainable, more people would be content to be ignorant than would take even a little trouble to acquire it.

人类非常厌恶智力劳动;但是，即使假定知识很容易获得，满足于无知的人也比愿意花一点力气去获得知识的人要多。

— Samuel Johnson 塞缪尔·约翰逊