Eudoxus of Cnidos, the son of Aeschines, was an astronomer, a geometer, a physician and a legislator. He learned geometry from Archytas and medicine from Philistion the Sicilian, as Callimachus tells us in his Tables. Sotion in his Successions of Philosophers says that he was also a pupil of Plato. When he was about twenty-three years old and in straitened circumstances, he was attracted by the reputation of the Socratics and set sail for Athens with Theomedon the physician, who provided for his wants. Some even say that he was Theomedon's favourite. Having disembarked at Piraeus he went up every day to Athens and, when he had attended the Sophists' lectures, returned again to the port [11 km em cada direcção!: tinha quarto no Pireu, onde era muito mais barato]. After spending two months there, he went home and, aided by the liberality of his friends, he proceeded to Egypt with Chrysippus the physician, bearing with him letters of introduction from Agesilaus to Nectanabis, who recommended him to the priests. There he remained one year and four months [...].
Diógenes Laércio, Vidas e Opiniões de Filósofos Eminentes 8.8
Harvard University Press, Cambridge MA: 1925. (trad.: Robert Hicks).
[Εὔδοξος Αἰσχίνου Κνίδιος, ἀστρολόγος, γεωμέτρης, ἰατρός, νομοθέτης. οὗτος τὰ μὲν γεωμετρικὰ Ἀρχύτα διήκουσε, τὰ δ᾽ ἰατρικὰ Φιλιστίωνος τοῦ Σικελιώτου, καθὰ Καλλίμαχος ἐν τοῖς Πίναξί φησι. Σωτίων δ᾽ ἐν ταῖς Διαδοχαῖς λέγει καὶ Πλάτωνος αὐτὸν ἀκοῦσαι. γενόμενον γὰρ ἐτῶν τριῶν που καὶ εἴκοσι καὶ στενῶς διακείμενον κατὰ κλέος τῶν Σωκρατικῶν εἰς Ἀθήνας ἀπᾶραι σὺν Θεομέδοντι τῷ ἰατρῷ, τρεφόμενον ὑπ᾽ αὐτοῦ: οἱ δέ, καὶ παιδικὰ ὄντα: καταχθέντα δ᾽ εἰς τὸν Πειραιᾶ ὁσημέραι ἀνιέναι Ἀθήναζε καὶ ἀκούσαντα τῶν σοφιστῶν αὐτόθι ὑποστρέφειν. δύο δὴ μῆνας διατρίψαντα οἴκαδ᾽ ἐπανελθεῖν καὶ πρὸς τῶν φίλων ἐρανισθέντα εἰς Αἴγυπτον ἀπᾶραι μετὰ Χρυσίππου τοῦ ἰατροῦ, συστατικὰς φέροντα παρ᾽ Ἀγησιλάου πρὸς Νεκτάναβιν: τὸν δὲ τοῖς ἱερεῦσιν αὐτὸν συστῆσαι. καὶ τέτταρας μῆνας πρὸς ἐνιαυτῷ διατρίψαντ᾽...]
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