Why is music so powerful on the brain?

Every cell of the brain is as a piano key to some part of the music of the body, and by turning the scalp skin a little and passing over the key—at the same time touching the body at the point of disease—gives a response. 

Thus, if anything ailed the minor organs, it could be told by the tender state of the key. Besides the insanity cures come in under this law. Spirits often go down to cure those who rise with twisted magnetisms, taking out the brain, part by part, before the spirit has fully formed, and cleaning it, as you would a watch.