Plato, Laws 811a

πολυμαθεῖς, ὅλους ποιητὰς ἐκμανθάνοντας· οἱ δὲ ἐκ πάντων κεφάλαια ἐκλέξαντες καί τινας ὅλας ῥήσεις εἰς ταὐτὸν συναγαγόντες, ἐκμανθάνειν φασὶ δεῖν εἰς μνήμην τιθεμένους, εἰ μέλλει τις ἀγαθὸς ἡμῖν καὶ σοφὸς ἐκ πολυπειρίας καὶ πολυμαθίας γενέσθαι. τούτοις δὴ σὺ κελεύεις ἐμὲ τὰ νῦν παρρησιαζόμενον ἀποφαίνεσθαι τί τε καλῶς λέγουσι καὶ τί μή; πῶς γὰρ οὔ; τί δή ποτʼ ἂν οὖν περὶ ἁπάντων τούτων ἑνὶ λόγῳ

and large learners, who learn off whole poets by heart. Others there are who compile select summaries of all the poets, and piece together whole passages, telling us that a boy must commit these to memory and learn them off if we are to have him turn out good and wise as a result of a wide and varied range of instruction. Would you have me now state frankly to these poets what is wrong about their declarations and what right? Of course. What single statement can I make about all these people