Plato, Laws 642a

σκοπῶ δὴ μὴ δόξαν ὑμῖν παράσχωμαι περὶ σμικροῦ πολλὰ λέγειν, μέθης πέρι, σμικροῦ πράγματος, παμμήκη λόγον ἀνακαθαιρόμενος. τὸ δὲ ἡ κατὰ φύσιν αὐτοῦ διόρθωσις οὐκ ἂν δύναιτο ἄνευ μουσικῆς ὀρθότητός ποτε σαφὲς οὐδὲ ἱκανὸν ἐν τοῖς λόγοις ἀπολαβεῖν, μουσικὴ δὲ ἄνευ παιδείας τῆς πάσης οὐκ ἂν αὖ ποτε δύναιτο· ταῦτα δὲ παμπόλλων ἐστὶν λόγων. ὁρᾶτε οὖν τί ποιῶμεν εἰ ταῦτα μὲν ἐάσαιμεν ἐν τῷ

so I am afraid of making you think that I am a great talker about a small matter, if I spin out a discourse of prodigious length about the small matter of drunkenness. But the fact is that the right ordering of this could never be treated adequately and clearly in our discourse apart from rightness in music, nor could music, apart from education as a whole; and these require lengthy discussions. Consider, then, what we are to do: suppose we leave these matters over for the present,