Many quotes about music can be found online with a simple search for 'music quotes', but none of these are as effective at getting the point across as to how music affects people as this video:

"Music hath charms to soothe a savage breast, to soften rocks, or bend a knotted oak." William Congreve

"After silence, that which comes nearest to expressing the inexpressible is music. "
Aldous Huxley

"I think music in itself is healing. It's an explosive expression of humanity. It's something we are all touched by. No matter what culture we're from, everyone loves music."
Billy Joel

"Music is the movement of sound to reach the soul for the education of its virtue."
Plato

"Music is the shorthand of emotion."
Leo Tolstoy

Many of these quotes can be brought to life in this video of a man in a nursing home, usually lethargic, who's whole demeanor changes when the music starts.

(Via Youtube and BrainyQuote)