Making "Good" Music
Music of holiness is on an extraordinary high level, as is well known. The essence of such music is created when good is clarified and removed from evil. When one removes and separates good points from evil, music is formed. When a person does not allow himself to fall, but rejuvenates himself by searching within himself for the good points, and he gathers these good points out of the bad that is also within him, tunes are formed.
(Rebbe Nachman of Breslov)