That which cannot be expressed otherwise can only be told through music. A thought, which seems common place in its analysis, acquires a depper sense in music.
Peace of mind has nothing to do with the external world; it has only to do with our connection with God. Love really is the answer. We're here only to teach love. When we're doing that, our souls are singing and dancing. When we remind ourselves that we are spiritual beings, that life and love are the flame eternal, that's when our soul is nourished.