Plato, Laws 689d

πρὸς τάχος τῆς ψυχῆς πεφυκότα διαπεπονημένοι ἅπαντα, τοὺς δὲ τοὐναντίον ἔχοντας τούτων ὡς σοφούς τε προσρητέον, ἂν καὶ τὸ λεγόμενον μήτε γράμματα μήτε νεῖν ἐπίστωνται, καὶ τὰς ἀρχὰς δοτέον ὡς ἔμφροσιν. πῶς γὰρ ἄν, ὦ φίλοι, ἄνευ συμφωνίας γένοιτʼ ἂν φρονήσεως καὶ τὸ σμικρότατον εἶδος; οὐκ ἔστιν, ἀλλʼ ἡ καλλίστη καὶ μεγίστη τῶν συμφωνιῶν μεγίστη δικαιότατʼ ἂν λέγοιτο σοφία, ἧς ὁ μὲν κατὰ λόγον ζῶν μέτοχος, ὁ δὲ ἀπολειπόμενος οἰκοφθόρος καὶ περὶ πόλιν οὐδαμῇ σωτὴρ ἀλλὰ πᾶν τοὐναντίον ἀμαθαίνων εἰς ταῦτα

of soul, while those whose mental condition is the reverse of this shall be entitled wise, even if—as the saying goes—they spell not neither do they swim; and to these latter, as to men of sense, the government shall be entrusted. For without harmony, my friends, how could even the smallest fraction of wisdom exist? It is impossible. But the greatest and best of harmonies would most properly be accounted the greatest wisdom; and therein he who lives rationally has a share, whereas he who is devoid thereof