The Republic by Plato Part 2 Page 63

Then we have found the desired natures; and now that we have found them, how are they to be reared and educated? Is not this an enquiry which may be expected to throw light on the greater enquiry which is our final end — How do justice and injustice grow up in States? for we do not want either to omit what is to the point or to draw out the argument to an inconvenient length.

Adeimantus thought that the enquiry would be of great service to us.

Then, I said, my dear friend, the task must not be given up, even if somewhat long.

Certainly not.

Come then, and let us pass a leisure hour in story-telling, and our story shall be the education of our heroes.

By all means.