The Republic by Plato Part 3 Page 42

We certainly will, he said, if we have the power.

Then now, my friend, I said, that part of music or literary education which relates to the story or myth may be considered to be finished; for the matter and manner have both been discussed.

I think so too, he said.

Next in order will follow melody and song.

That is obvious.

Every one can see already what we ought to say about them, if we are to be consistent with ourselves.

I fear, said Glaucon, laughing, that the word ‘every one’ hardly includes me, for I cannot at the moment say what they should be; though I may guess.

At any rate you can tell that a song or ode has three parts —