Plato, Letters 344c

μάλιστʼ εἰς δύναμιν ἀνθρωπίνην. διὸ δὴ πᾶς ἀνὴρ σπουδαῖος τῶν ὄντων σπουδαίων πέρι πολλοῦ δεῖ μὴ γράψας ποτὲ ἐν ἀνθρώποις εἰς φθόνον καὶ ἀπορίαν καταβαλεῖ. ἑνὶ δὴ ἐκ τούτων δεῖ γιγνώσκειν λόγῳ, ὅταν ἴδῃ τίς του συγγράμματα γεγραμμένα εἴτε ἐν νόμοις νομοθέτου εἴτε ἐν ἄλλοις τισὶν ἅττʼ οὖν, ὡς οὐκ ἦν τούτῳ ταῦτα σπουδαιότατα, εἴπερ ἔστʼ αὐτὸς σπουδαῖος, κεῖται δέ που ἐν χώρᾳ τῇ καλλίστῃ τῶν τούτου· εἰ δὲ ὄντως αὐτῷ ταῦτʼ ἐσπουδασμένα ἐν γράμμασιν

And this is the reason why every serious man in dealing with really serious subjects carefully avoids writing, lest thereby he may possibly cast them as a prey to the envy and stupidity of the public. In one word, then, our conclusion must be that whenever one sees a man’s written compositions—whether they be the laws of a legislator or anything else in any other form,—these are not his most serious works, if so be that the writer himself is serious: rather those works abide in the fairest region he possesses. If, however, these really are his serious efforts, and put into writing, it is not the gods but mortal men who