Not that this division of music and gymnastic really corresponds to soul and body; for they are both equally concerned with the soul, which is tamed by the one and aroused and sustained by the other.

The two together supply our guardians with their twofold nature.
The passionate disposition when it has too much gymnastic is hardened and brutalized, the gentle or philosophic temper which has too much music becomes enervated.

While a man is allowing music to pour like water through the funnel of his ears, the edge of his soul gradually wears away, and the passionate or spirited element is melted out of him.

Too little spirit is easily exhausted; too much quickly passes into nervous irritability.

So, again, the athlete by feeding and training has his courage doubled, but he soon grows stupid; he is like a wild beast, ready to do everything by blows and nothing by counsel or policy.