Plato, Letters 330b

ὡς δὴ μανθάνων καὶ ἀκούων τῶν περὶ φιλοσοφίαν λόγων οἰκειοῦσθαι καὶ ἐμοὶ συγγίγνεσθαι, φοβούμενος τοὺς τῶν διαβαλλόντων λόγους, μή πῃ παραποδισθείη καὶ δίων δὴ πάντα εἴη διαπεπραγμένος. ἐγὼ δὲ πάντα ὑπέμενον, τὴν πρώτην διάνοιαν φυλάττων ᾗπερ ἀφικόμην, εἴ πως εἰς ἐπιθυμίαν ἔλθοι τῆς φιλοσόφου ζωῆς· ὁ δʼ ἐνίκησεν ἀντιτείνων.καὶ ὁ πρῶτος δὴ χρόνος τῆς εἰς Σικελίαν ἐμῆς ἐπιδημίας

namely, by occupying himself in learning and in listening to discourses on philosophy and by associating with me—this he always shirked owing to his dread of the talk of slanderers, lest he might be hampered in some measure and Dion might accomplish all his designs. I, however, put up with all this, holding fast the original purpose with which I had come, in the hope that he might possibly gain a desire for the philosophic life; but he, with his resistance, won the day. These, then, were the causes which brought about my visit to Sicily and my sojourn there, on the first occasion. After this I went away,