Moreover, many have reported her the daughter of Hermes, and many of Prometheus; the latter of which they esteem as the author of wit and forecast, and the former of letters and music. For the same reason also they call the former of the Muses at Hermopolis at the same time Isis and Justice, Isis being (as we before said) no other than wisdom, and revealing things divine to such as are truly and justly styled the sacred bearers, and keepers of the sacred robes; and these are such as have in their minds, as in an ark, the sacred doctrine about the Gods, cleansed from superstitious frights and vain curiosities, keeping out of sight all dark and shady colors, and exposing to sight the light and gay ones, to insinuate something of the like kind in our persuasion about the Gods as we have represented to us in the sacred vestments. Wherefore, in that the priests of Isis are dressed up in these when they are dead, it is a token to us that this doctrine goes with them to the other life, and that nothing else can accompany them thither. For as neither the nourishing of beards nor the wearing of mantles can ren der men philosophers, so neither will linen garments or shaved heads make priests to Isis; but he is a true priest of Isis, who, after he hath received from the laws the representations and actions that refer to the Gods, doth next apply his reason to the enquiry and speculation of the truth contained in them.