Plutarch, De Iside et Osiride 62

ἔοικε δὲ τούτοις καὶ τὰ Αἰγύπτια. τὴν μὲν γὰρ Ἶσιν πολλάκις τῷ τῆς Ἀθηνᾶς ὀνόματι καλοῦσι φράζοντι τοιοῦτον λόγον ἦλθον ἀπʼ ἐμαυτῆς, ὅπερ ἐστὶν αὐτοκινήτου φορᾶς δηλωτικὸν ὁ δὲ Τυφών, ὥσπερ εἴρηται, Σὴθ καὶ Βέβων καὶ Σμὺ ὀνομάζεται, βίαιόν τινα καὶ κωλυτικὴν ἐπίσχεσιν, ὑπεναντίωσιν ἢ ἀναστροφὴν ἐμφαίνειν βουλομένων τῶν ὀνομάτων. ἔτι τὴν σιδηρῖτιν λίθον ὀστέον Ὥρου , Τυφῶνος δὲ τὸν σίδηρον, ὡς ἱστορεῖ Μανεθώς, καλοῦσιν· ὥσπερ γὰρ ὁ σίδηρος πολλάκις μὲν ἑλκομένῳ καὶ ἑπομένῳ πρὸς τὴν λίθον ὅμοιός ἐστι, πολλάκις δʼ ἀποστρέφεται καὶ ἀποκρούεται πρὸς τοὐναντίον, οὕτως ἡ σωτήριος καὶ ἀγαθὴ καὶ λόγον ἔχουσα τοῦ κόσμου κίνησις ἐπιστρέφεταί τε καὶ προσάγεται καὶ μαλακωτέραν ποιεῖ, πείθουσα τὴν σκληρὰν ἐκείνην καὶ τυφώνειον, εἶτʼ αὖθις ἀνασχεθεῖσα εἰς ἑαυτὴν ἀνέστρεψε καὶ κατέδυσεν εἰς τὴν ἀπειρίαν. ἔτι φησὶ περὶ τοῦ Διὸς ὁ Εὔδοξος μυθολογεῖν Αἰγυπτίους, ὡς τῶν σκελῶν συμπεφυκότων αὐτῷ μὴ δυνάμενος βαδίζειν, ὑπʼ αἰσχύνης ἐν ἐρημίᾳ διέτριβεν· ἡ δʼ Ἶσις διατεμοῦσα καὶ διαστήσασα τὰ μέρη ταῦτα τοῦ σώματος ἀρτίποδα τὴν πορείαν παρέσχεν. αἰνίττεται δὲ καὶ διὰ τούτων ὁ μῦθος, ὅτι καθʼ ἑαυτὸν ὁ τοῦ θεοῦ νοῦς καὶ λόγος ἐν τῷ ἀοράτῳ καὶ ἀφανεῖ βεβηκὼς εἰς γένεσιν ὑπὸ κινήσεως προῆλθεν.

Like these also are the Egyptian beliefs; for they oftentimes call Isis by the name of Athena, expressive of some such idea as this, I came of myself, which is indicative of self-impelled motion. Typhon, as has been said, is named Seth and Bebon and Smu, and these names would indicate some forcible and preventive check or opposition or reversal. Moreover, they call the loadstone the bone of Horus, and iron the bone of Typhon, as Manetho records. For, as the iron oftentimes acts as if it were being attracted and drawn toward the stone, and oftentimes is rejected and repelled in the opposite direction, in the same way the salutary and good and rational movement of the world at one time, by persuasion, attracts and draws toward itself and renders more gentle that harsh and Typhonian movement, and then again it gathers itself together and reverses it and plunges it into difficulties. Moreover, Eudoxus says that the Egyptians have a mythical tradition in regard to Zeus that, because his legs were grown together, he was not able to walk, and so, for shame, tarried in the wilderness; but Isis, by severing and separating those parts of his body, provided him with means of rapid progress. This fable teaches by its legend that the mind and reason of the god, fixed amid the unseen and invisible, advanced to generation by reason of motion.