Note 53 — Chapter XXXVII · REPUBLIC — REMARKS ON THE PLATONIC COMMONWEALTH.
Reading edition
Plato, Republ. x. p. 607 A-C. τὴν ἡδυσμένην Μοῦσαν … ἡ πρὸς ἡδονὴν ποιητικὴ καὶ ἡ μίμησις, &c.
Compare also Leges ii. p. 655 D seq., about the μουσικῆς ὀρθότης.