Plato, Laws 812a

νέους αὐτοῖς παραδιδόναι διδάσκειν τε καὶ παιδεύειν. οὗτός μοι μῦθος ἐνταῦθα καὶ οὕτω τελευτάτω, περὶ γραμματιστῶν τε εἰρημένος ἅμα καὶ γραμμάτων. κατὰ μὲν τὴν ὑπόθεσιν, ὦ ξένε, ἔμοιγε οὐ φαινόμεθα ἐκτὸς πορεύεσθαι τῶν ὑποτεθέντων λόγων· εἰ δὲ τὸ ὅλον κατορθοῦμεν ἢ μή, χαλεπὸν ἴσως διισχυρίζεσθαι. τότε γάρ, ὦ Κλεινία, τοῦτό γʼ αὐτὸ ἔσται καταφανέστερον, ὡς εἰκός, ὅταν, ὃ πολλάκις εἰρήκαμεν, ἐπὶ τέλος ἀφικώμεθα πάσης τῆς διεξόδου περὶ νόμων.

Here and herewith let me end my homily concerning writing-masters and writings. Judged by our original intention, Stranger, I certainly do not think that we have diverged from the line of argument we intended; but about the matter as a whole it is hard, no doubt, to be sure whether or not we are right. That, Clinias, (as we have often said) will probably become clearer of itself when we arrive at the end of our whole exposition concerning laws.