Some of my favorites:
"Music is what feeling sounds like"
“When the music changes, so does the dance” ~African Proverb
"Music is an outburst of soul." ~Frederick Delius
Music produces a kind of pleasure which human nature cannot do without. ~Confucius
Music is the mediator between the spiritual and the sensual life. ~Ludwig van Beethoven
Music is the shorthand of emotion. ~Leo Tolstoy
"Music profoundly affects my mood." ~Paige Vitulli