Eros and Psyche is a myth we see included in the book Metamorphoses of Apuleius, written in the 2nd-century a.C. Books four to six contain the myth and it was a common Platonic habit to put a myth when you didn't want to say something openly. The myth starts from point 28 of the fourth book and ends at point 24 of the sixth book.
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It amazes me how so many traditions follow these ancient protocols and roles,