Isocrates, Against the Sophists 9-10
“We must rebuke not only those sophists but also those who promise to teach political oratory—for these guys don’t care at all about the truth but instead think that it is an art because they get the greatest number of students thanks to the small size of their fee and the greatness of their pronouncements and then they get something from them.
They are so imperceptive and imagine everyone else to be that even though they write speeches worse than some of the untrained masses compose, they still guarantee that they will make their students the kinds of politicians who never leave out any of the possibilities in a matter.
Even worse, they don’t derive any of that power from their experiences or the talent of a student, but they say that they can train the knowledge of speaking as they would basic literacy—in reality, each of them believe that because of the insanity of their promises they will be objects of wonder and that people will think that training in their discipline is worth more than it is. In this, they have not even considered that the people who make arts great are not those who dare to boast about them, but those who have the ability to discover what the power of each art is on its own.”
Οὐ μόνον δὲ τούτοις ἀλλὰ καὶ τοῖς τοὺς πολιτικοὺς λόγους ὑπισχνουμένοις ἄξιον ἐπιτιμῆσαι καὶ γὰρ ἐκεῖνοι τῆς μὲν ἀληθείας οὐδὲν φροντίζουσιν, ἡγοῦνται δὲ τοῦτ᾿ εἶναι τὴν τέχνην, ἢν ὡς πλείστους τῇ μικρότητι τῶν μισθῶν καὶ τῷ μεγέθει τῶν ἐπαγγελμάτων προσαγάγωνται καὶ λαβεῖν τι παρ᾿ αὐτῶν δυνηθῶσιν· οὕτω δ᾿ ἀναισθήτως αὐτοί τε διάκεινται καὶ τοὺς ἄλλους ἔχειν ὑπειλήφασιν, ὥστε χεῖρον γράφοντες τοὺς λόγους ἢ τῶν ἰδιωτῶν τινες αὐτοσχεδιάζουσιν, ὅμως ὑπισχνοῦνται τοιούτους ῥήτορας τοὺς συνόντας ποιήσειν ὥστε μηδὲν τῶν ἐνόντων ἐν τοῖς πράγμασι παραλιπεῖν. καὶ ταύτης τῆς δυνάμεως οὐδὲν οὔτε ταῖς ἐμπειρίαις οὔτε τῇ φύσει τῇ τοῦ μαθητοῦ μεταδιδόασιν, ἀλλά φασιν ὁμοίως τὴν τῶν λόγων ἐπιστήμην ὥσπερ τὴν τῶν γραμμάτων παραδώσειν, ὡς μὲν ἔχει τούτων ἑκάτερον, οὐκ ἐξετάσαντες, οἰόμενοι δὲ διὰ τὰς ὑπερβολὰς τῶν ἐπαγγελμάτων αὐτοί τε θαυμασθήσεσθαι καὶ τὴν παίδευσιν τὴν τῶν λόγων πλέονος ἀξίαν δόξειν εἶναι, κακῶς εἰδότες ὅτι μεγάλας ποιοῦσι τὰς τέχνας οὐχ οἱ τολμῶντες ἀλαζονεύεσθαι περὶ αὐτῶν, ἀλλ᾿ οἵτινες ἄν, ὅσον ἔνεστιν ἐν ἑκάστῃ, τοῦτ᾿ ἐξευρεῖν δυνηθῶσιν.