The Republic by Plato Part 3 Page 61

Certainly.

Gymnastic as well as music should begin in early years; the training in it should be careful and should continue through life. Now my belief is, — and this is a matter upon which I should like to have your opinion in confirmation of my own, but my own belief is, — not that the good body by any bodily excellence improves the soul, but, on the contrary, that the good soul, by her own excellence, improves the body as far as this may be possible. What do you say?

Yes, I agree.

Then, to the mind when adequately trained, we shall be right in handing over the more particular care of the body; and in order to avoid prolixity we will now only give the general outlines of the subject.

Very good.