Lucian, A Professor of Public Speaking, 17
“There are times when you yourself make up new and different words and decide to call one interpreter “fine-spoken”, another smart man “wise-brained”, or some dancer “hands-wise”.
Let shamelessness be the one medicine you use if you offer a solecism or barbarism: immediately offer up the name of someone who doesn’t exist and never did—some poet or scholar—a wise man who was expertly precise in his language and condoned speaking in this way.
But don’t read the classics at all, especially not the silly Isocrates, or the Demosthenes blessed with little skill, or the boring Plato. No! read only those speeches from those a little bit before our time and those things they call ‘practice-pieces” so you may have a supply of phrases you can use at the right time as if you were pulling something from a pantry.”
ἐνίοτε δὲ καὶ αὐτὸς ποίει καινὰ καὶ ἀλλόκοτα ὀνόματα καὶ νομοθέτει τὸν μὲν ἑρμηνεῦσαι δεινὸν “εὔλεξιν” καλεῖν, τὸν συνετὸν “σοφόνουν,” τὸν ὀρχηστὴν δὲ “χειρίσοφον.” ἂν σολοικίσῃς δὲ ἢ βαρβαρίσῃς, ἓν ἔστω φάρμακον ἡ ἀναισχυντία, καὶ πρόχειρον εὐθὺς ὄνομα οὔτε ὄντος τινὸς οὔτε γενομένου ποτέ, ἢ ποιητοῦ ἢ συγγραφέως, ὃς οὕτω λέγειν ἐδοκίμαζε σοφὸς ἀνὴρ καὶ τὴν φωνὴν εἰς τὸ ἀκρότατον ἀπηκριβωμένος. ἀλλὰ καὶ ἀναγίγνωσκε τὰ παλαιὰ μὲν μὴ σύ γε, μηδὲ εἴ τι ὁ λῆρος Ἰσοκράτης ἢ ὁ χαρίτων ἄμοιρος Δημοσθένης ἢ ὁ ψυχρὸς Πλάτων, ἀλλὰ τοὺς τῶν ὀλίγον πρὸ ἡμῶν λόγους καὶ ἅς φασι ταύτας μελέτας, ὡς ἔχῃς ἀπ᾿ ἐκείνων ἐπισιτισάμενος ἐν καιρῷ καταχρῆσθαι καθάπερ ἐκ ταμιείου προαιρῶν.