The former musician, Hazrat Inayat Khan gave up the practise of music "to tune souls instead of instruments, to harmonize people instead of notes ... Music, the word we use in our everyday language, is nothing less than the picture of our Beloved ... It is because music is the picture of our Beloved that we love music."
You know of the disease called sleeping sickness. There also exists a sleeping sickness of the soul. Itsmost dangerous aspect is that one is unaware of its coming. That is why you have to be careful. As soon as you notice the slightest sign of indifference, the moment you become aware of the loss of a certain seriousness, of longing, of enthusiasm and zest, take it as a warning: your soul suffers if you live superficially.