I think the role of art is to project our sense of meaning into the universe, thus making our environment more legitimately meaningful. It (among many other things) is proving that an imagined sense of meaning is a real one.
I also believe that creating something tangible that makes you feel something, and then showing it to others and it makes them feel something, is almost like emotional telepathy. It is a much more direct mode of emotional communication than anything else. As humans we know meaning when we see it, it's an instinctual spiritual yearning, it is a bittersweet feeling of something greater than yourself. It makes you cry, and you don't know why. That is why I love music, because it is much bigger than the person who wrote it.