Studies show that music alters the moods. When depressed experts say start playing depressing music and then change it slowly but surely until you get more and more progressively happy music into your ears. This technique is shown to improve moods.
Studies show music makes imprints on the brain. Many people never graduate from the music they played in their teen years because of this. (Thus, for some of you millennials, I really hope your grandkids love listening to Britney Spears when you drive him to the park, forty years from now).
For instance my sister is probably still listening to led Zeppelin stairway to heaven for the 1 millionth time.
if you enjoy classical music at all, I highly recommend you listen to this piece; it's very uplifting. My personal favorite classical piece.