Arthur Schopenhauer’s theory of music would explain this as follows: Music is the form of the will to existence freed from the principio individuationis. When we are healthy and our individualized will is, so to speak, “out of danger,” our intellect can delight in the pure beauty of the expression of this “primordial will” aka music. But when we are ill—this will draws us over to its side, whispering, “Give up your individuality, my friend. Come to me!”