The Republic by Plato Part 3 Page 65

athletes are well aware that a man who is to be in good condition should take nothing of the kind.

Yes, he said; and knowing this, they are quite right in not taking them.

Then you would not approve of Syracusan dinners, and the refinements of Sicilian cookery?

I think not.

Nor, if a man is to be in condition, would you allow him to have a Corinthian girl as his fair friend?

Certainly not.

Neither would you approve of the delicacies, as they are thought, of Athenian confectionary?

Certainly not.

All such feeding and living may be rightly compared by us to melody and song composed in