The Republic by Plato Part 3 Page 23

said about men is a question which we cannot determine until we have discovered what justice is, and how naturally advantageous to the possessor, whether he seem to be just or not.

Most true, he said.

Enough of the subjects of poetry: let us now speak of the style; and when this has been considered, both matter and manner will have been completely treated.

I do not understand what you mean, said Adeimantus.

Then I must make you understand; and perhaps I may be more intelligible if I put the matter in this way.

You are aware, I suppose, that all mythology and poetry is a narration of events, either past, present, or to come?

Certainly, he replied.