Meditations 6.13

When we have meat before us and such eatables, we receive the impression that this is the dead body of a fish, and this the dead body of a bird or of a pig; and again, that this Falernian is only a little grape-juice, and this purple robe some sheep's wool dyed with the blood of a shell-fish: such then are these impressions, and they reach the things themselves and penetrate them, and so we see what kind of things they are. Just in the same way ought we to act all through life, and where there are things which appear most worthy of our approbation, we ought to lay them bare and look at their worthlessness and strip them of all the words by which they are exalted. For outward show is a wonderful perverter of the reason, and when thou art most sure that thou art employed about things worth thy pains, it is then that it cheats thee most. Consider then what Crates says of Xenocrates himself.

Marcus Aurelius, Meditations 6.13, translated by George Long

As in the case of meat and similar eatables the thought strikes us, this is the dead body of a fish, this of a fowl or pig; and again that this Falernian is merely the juice of a grape-cluster, and this purple-edged robe is nought but sheep's wool steeped in the blood of a shell-fish; or, of sexual intercourse, that it is merely internal attrition and the spasmodic excretion of mucus—such, I say, as are these impressions that get to grips with the actual things and enter into the heart of them, so as to see them as they really are, thus should it be thy life through, and where things look to be above measure convincing, laying them quite bare, behold their paltriness and strip off their conventional prestige. For conceit is a past master in fallacies and, when thou flatterest thyself most that thou art engaged in worthy tasks, then art thou most of all deluded by it. At any rate, see what Crates has to say about none other than Xenocrates.

Marcus Aurelius, Meditations 6.13, translated by C. R. Haines