Aelian, Varia Historia 2.30
“Plato, the son of Ariston, at first pursued poetry and used to write heroic verse. But he soon burned it all because he despised it, since he reckoned that his poetry was far inferior when compared to Homer’s. He then tried tragedy and even completed a tetralogy, and he was about to enter the competition, even to the point of giving the verses to actors. But right before the Dionysia, he went and heard Socrates; and once he was seized by that Siren, he not only withdrew from the competition, but he also gave up the writing of tragedy for good to immerse himself in philosophy.”
Πλάτων ὁ ᾿Αρίστωνος τὰ πρῶτα ἐπὶ ποιητικὴν ὥρμησε, καὶ ἡρωϊκὰ ἔγραφε μέτρα• εἶτα αὐτὰ κατέπρησεν ὑπεριδὼν αὐτῶν, ἐπεὶ τοῖς ῾Ομήρου αὐτὰ ἀντικρίνων ἑώρα κατὰ πολὺ ἡττώμενα. ἐπέθετο οὖν τραγῳδίᾳ, καὶ δὴ καὶ τετραλογίαν εἰργάσατο, καὶ ἔμελλεν ἀγωνιεῖσθαι, δοὺς ἤδη τοῖς ὑποκριταῖς τὰ ποιήματα. πρὸ τῶν Διονυσίων δὲ παρελθὼν ἤκουσε Σωκράτους, καὶ ἅπαξ αἱρεθεὶς ὑπὸ τῆς ἐκείνου σειρῆνος, τοῦ ἀγωνίσματος οὐ μόνον ἀπέστη τότε, ἀλλὰ καὶ τελέως τὸ γράφειν τραγῳδίαν ἀπέρριψε, καὶ ἀπεδύσατο ἐπὶ φιλοσοφίαν.
Although he did not master poetry, Plato could still deal out a sick burn:
“Plato used to call Aristotle Pôlos [the Foal]. What did he wish with that name? Everyone knows that a foal, when it has had its fill of baby’s milk, kicks its mother. Thus Plato was signaling a certain ingratitude on Aristotle’ part. Indeed, Aristotle received the greatest seeds of Philosophy from Plato and then, though he was filled to the brim with the best ideas, he broke with Plato rebelliously. He founded his own house, took his friends on Plato’s walk, and set himself up to be Plato’s rival.”
῾Ο Πλάτων τὸν ᾿Αριστοτέλη ἐκάλει Πῶλον. τί δὲ ἐβούλετο αὐτῷ τὸ ὄνομα ἐκεῖνο; δηλονότι ὡμολόγηται τὸν πῶλον, ὅταν κορεσθῇ τοῦ μητρῴου γάλακτος, λακτίζειν τὴν μητέρα. ᾐνίττετο οὖν καὶ ὁ Πλάτων ἀχαριστίαν τινὰ τοῦ ᾿Αριστοτέλους. καὶ γὰρ ἐκεῖνος μέγιστα ἐς φιλοσοφίαν παρὰ Πλάτωνος λαβὼν σπέρματα καὶ ἐφόδια, εἶτα ὑποπλησθεὶς τῶν ἀρίστων καὶ ἀφηνιάσας, ἀντῳκοδόμησεν αὐτῷ διατριβὴν καὶ ἀντιπαρεξήγαγεν ἐν τῷ περιπάτῳ ἑταίρους ἔχων καὶ ὁμιλητάς, καὶ ἐγλίχετο ἀντίπαλος εἶναι Πλάτωνι.