If the element of spirit is naturally weak in him the change is speedily accomplished, but if he have a good deal, then the power of music weakening the spirit renders him excitable; — on the least provocation he flames up at once, and is speedily extinguished; instead of having spirit he grows irritable and passionate and is quite impracticable.

Exactly.

And so in gymnastics, if a man takes violent exercise and is a great feeder, and the reverse of a great student of music and philosophy, at first the high condition of his body fills him with pride and spirit, and he becomes twice the man that he was.

Certainly.

And what happens? if he do nothing else, and holds no converse with the Muses, does not even that