Plutarch Quaestiones Convivales 9.14.4

[4] As soon as he had said this, Trypho the physician subjoined: How hath our art offended you, that you have shut the Museum against us? And Dionysius of Melite added: Sir, you have a great many that will side with you in the accusation; for we farmers think Thalia to be ours, assigning her the care of springing and budding seeds and plants. But I interposing said: Your accusation is not just; for you have bountiful Ceres, and Bacchus who (as Pindar phraseth it) increaseth the trees, the chaste beauty of the fruits; and we know that Aesculapius is the patron of the physicians, and they make their address to Apollo as Paean, but never as the Muses’ chief. All men (as Homer says) stand in need of the Gods, but all stand not in need of all. But I wonder Lamprias did not mind what the Delphians say in this matter; for they affirm that the Muses amongst them were not named so either from the strings or sounds in music; but the universe being divided into three parts, the first portion was of the fixed stars, the second of the planets, the third of those things that are under the concave of the moon; and all these are ordered according to harmonical proportions, and of each portion a Muse takes care; Hypate of the first, Nete of the last, and Mese in the middle, combining as much as possible, and turning about mortal things with the Gods, and earthly with heavenly. And Plato intimates the same thing under the names of the Fates, calling one Atropos, the other Lachesis, and the other Clotho. For he committed the revolutions of the eight spheres to so many Sirens, and not Muses.