Plutarch · c. AD 46-after 119
Plutarch's treatise On Isis and Osiris (De Iside et Osiride) is addressed to Clea, priestess of Delphi and devotee of Isis. It gives the fullest Greek account of the Egyptian myth: Osiris who brought civilisation to Egypt, the plot of his brother Typhon (Seth), the chest, Isis' search, the dismemberment of Osiris and the vengeance of Horus. Plutarch then weighs the explanations of the myth (as history, as daemonology, as nature allegory, as astronomy and as a struggle of good and evil) and ends with Egyptian animal cults, symbols, vestments and the incense kyphi. It is the main ancient source for the Greek identification of Osiris with Dionysus and Isis with Demeter.
English translation by William Baxter (1874). Original text: William W. Goodwin (ed.), Plutarch's Morals, translated from the Greek by several hands, vol. 4, Boston: Little, Brown and Company; Cambridge: Press of John Wilson and Son, 1874 (Greek text: Gregorius N. Bernardakis, Plutarchi Chaeronensis Moralia, vol. 2, Leipzig: Teubner, 1889, as digitised by Perseus).
Greek text and translation from the Perseus Digital Library, Tufts University, CC BY-SA 4.0 (Perseus Digital Library); translation public domain. Introductions, summaries and notes © GreekMythology.com.