Plato, Letters 326d

πάντα εἰς ὑπερβολάς, ἀργῶν δὲ εἰς ἅπαντα ἡγουμένων αὖ δεῖν γίγνεσθαι πλὴν ἐς εὐωχίας καὶ πότους καὶ ἀφροδισίων σπουδὰς διαπονουμένας· ἀναγκαῖον δὲ εἶναι ταύτας τὰς πόλεις τυραννίδας τε καὶ ὀλιγαρχίας καὶ δημοκρατίας μεταβαλλούσας μηδέποτε λήγειν, δικαίου δὲ καὶ ἰσονόμου πολιτείας τοὺς ἐν αὐταῖς δυναστεύοντας μηδʼ ὄνομα ἀκούοντας ἀνέχεσθαι. ταῦτα δὴ πρὸς τοῖς πρόσθε διανοούμενος, εἰς Συρακούσας

yet believed that they ought to cease from all exertion except feastings and drinkings and the vigorous pursuit of their amours. Of necessity these States never cease changing into tyrannies, oligarchies, and democracies, and the men who hold power in them cannot endure so much as the mention of the name of a just government with equal laws. Holding these views, then, as well as those previously formed, I travelled through to Syracuse—possibly as luck would have it,