I just saw this awesome video from the World Science Festival 2009 where Bobby McFerrin jumps around on stage, and giving the audience only the root note to sing, they automatically know the rest of the notes with no further instruction. It's really funny when they just get it as soon as he hops "up a step".
What's really interesting is at the end when he says "What's interesting to me about that is, regardless of where I am, anywhere, every audience gets that."
In more ways than we understand, music really is a universal language. A language that connects more immediately to our emotions than our logic. I think the best music achieves a connection to both, in the right proportion, and through understanding as well we can reach even greater depths of emotional experience.
Check it out here.