"How good it is, when you have roast meat or suchlike foods before you, to impress on your mind that this is the dead body of a fish, this the dead body of a bird or pig; and again, that the Falernian wine is the mere juice of grapes, and your purple-edged robe simply the hair of a sheep soaked in shell-fish blood! And in sexual intercourse that it is no more than the friction of a membrane and a spurt of mucus ejected. How good these perceptions are at getting to the heart of the real thing and penetrating through it, so you can see it for what it is! This should be your practice throughout all your life: when things have such a plausible appearance, show them naked, see their shoddiness, strip away their own boastful account of themselves. Vanity is the greatest seducer of reason: when you are most convinced that your work is important, that is when you are most under its spell. See, for example, what Crates says even about Xenocrates."