Plato, Epistle 7 344c-e
“For this reason it is necessary that every serious person does not write about serious subjects so that they might not end up an object of envy or confusion among regular people. Simply, when you look at someone’s written work, whether it is a law by a legislator or anything by anyone else, you need to understand that this is not the person’s most serious work even if the author is very serious. Instead, his best works remain in the most noble part of his own realm. But if it turns out that the most serious works are those they have been written down, it is surely not the gods, but mortals themselves “who have totally ruined their senses.”
Anyone who has been following this story and my digression will clearly know that whether Dionysus has written anything about the ultimate and primary truths of nature or some lesser or greater mind has done the same, according to my argument nothing of what he has written is sound thanks to what he has learned or what he has heard. For, he would have the same respect for these things as I do and would not dare to make them available for inappropriate or unacceptable reception.
Dionysius did not write those things for the sake of reminding himself. For there is no danger of anyone forgetting a thing once he has obtained it with his soul, where it is settled among the smallest of all places. But it was for shameful pride, if truly he did write, either as a way of establishing the ideas as his own or to demonstrate that he was an initiate in great learning for which he proved himself unworthy by delighting in the reputation he might gain from it. If this happened to Dionysius because of our single interaction, it could be the case. But how, Only Zeus knows, as the Theban says. For, as I said before, I went through my ideas with him only once and never again afterwards.”
Διὸ δὴ πᾶς ἀνὴρ σπουδαῖος τῶν ὄντως σπουδαίων πέρι πολλοῦ δεῖ μὴ γράψας ποτὲ ἐν ἀνθρώποις εἰς φθόνον καὶ ἀπορίαν καταβάλῃ· ἑνὶ δὴ ἐκ τούτων δεῖ γιγνώσκειν λόγῳ, ὅταν ἴδῃ τίς του συγγράμματα γεγραμμένα εἴτε ἐν νόμοις νομοθέτου εἴτε ἐν ἄλλοις τισὶν ἅττ᾿ οὖν, ὡς οὐκ ἦν τούτῳ ταῦτα σπουδαιότατα, εἴπερ ἔστ᾿ αὐτὸς σπουδαῖος, κεῖται δέ που ἐν χώρᾳ τῇ καλλίστῃ τῶν τούτου· εἰ δὲ ὄντως αὐτῷ ταῦτ᾿ ἐσπουδασμένα ἐν γράμμασιν ἐτέθη, Ἐξ ἄρα δή οἱ ἔπειτα, θεοὶ μὲν οὔ, βροτοὶ δὲ φρένας ὤλεσαν αὐτοί.
Τούτῳ δὴ τῷ μύθῳ τε καὶ πλάνῳ ὁ ξυνεπισπόμενος εὖ εἴσεται, εἴτ᾿ οὖν Διονύσιος ἔγραψέ τι τῶν περὶ φύσεως ἄκρων καὶ πρώτων εἴτε τις ἐλάττων εἴτε μείζων, ὡς οὐδὲν ἀκηκοὼς οὐδὲ μεμαθηκὼς ἦν ὑγιὲς ὧν ἔγραψε κατὰ τὸν ἐμὸν λόγον· ὁμοίως γὰρ ἂν αὐτὰ ἐσέβετο ἐμοί, καὶ οὐκ ἂν αὐτὰ ἐτόλμησεν εἰς ἀναρμοστίαν καὶ ἀπρέπειαν ἐκβάλλειν. οὔτε γὰρ ὑπομνημάτων χάριν αὐτὰ ἔγραψεν· οὐδὲν γὰρ δεινὸν μή τις αὐτὸ ἐπιλάθηται, ἐὰν ἅπαξ τῇ ψυχῇ περιλάβῃ, πάντων γὰρ ἐν βραχυτάτοις κεῖται· φιλοτιμίας δὲ αἰσχρᾶς, εἴπερ, ἕνεκα, εἴθ᾿ ὡς αὑτοῦ τιθέμενος εἴθ᾿ ὡς παιδείας δὴ μέτοχος ὤν, ἧς οὐκ ἄξιος ἦν ἀγαπῶν δόξαν τὴν τῆς μετοχῆς γενομένην. εἰ μὲν οὖν ἐκ τῆς μιᾶς συνουσίας Διονυσίῳ τοῦτο γέγονε, τάχ᾿ ἂν εἴη· γέγονε δ᾿ οὖν ὅπως, ἴττω Ζεύς, φησὶν ὁ Θηβαῖος· διεξῆλθον μὲν γὰρ ὡς εἶπόν τότε ἐγὼ καὶ ἅπαξ μόνον, ὕστερον δὲ οὐ πώποτε ἔτι.