"The soul should take care of the body, just as the pilgrim on his way to Makkah takes care of his camel; but if the pilgrim spends his whole time in feeding and adorning his camel, the caravan will leave him behind, and he will perish in the desert."

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A cloud can look like a camel, but a camel is unlikely to look like a cloud. This is so because the signifier must be able to stand for the whole category of the signified. The cloud looks like all camels, but no camel looks like all clouds.

— Rudolf Arnheim