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Nothing that is irrational or fabulous or prompted by superstition, as some believe, has ever been given a place in their rites, but in them are some things that have moral and practical values, and others that are not without their share in the refinements of history or natural science, as, for example, that which has to do with the onion. For the tale that Dictys, the nurseling of Isis, in reaching for a clump of onions, fell into the river and was drowned is extremely incredible. But the priests keep themselves clear of the onion Cf. Aulus Gellius, xx. 8. and detest it and are careful to avoid it, because it is the only plant that naturally thrives and flourishes in the waning of the moon. It is suitable for neither fasting nor festival, because in the one case it causes thirst and in the other tears for those who partake of it.
8
In like manner they hold the pig to be an unclean animal, Cf. Herodotus, ii. 47. because it is reputed to be most inclined to mate in the waning of the moon, and because the bodies of those who drink its milk break out with leprosy and scabrous itching. Cf. Moralia, 670 f; Aelian, De Natura Animalium, x. 16; Tacitus, Histories, v. 4. The story which they relate at their only sacrifice and eating of a pig at the time of the full moon, how Typhon, while he was pursuing a boar by the light of the full moon, found the wooden coffin in which lay the body of Osiris, which he rent to pieces and scattered, Cf. 358 a, infra. they do not all accept, believing it to be a misrepresentation, even as many other things are.