Music as many people have said is the universal language. Of course points are made which make you think about things but ultimately it makes you feel. And that's why people remember more songs that have meant something during their life than films. They start to define periods in your life and that's kind of the beauty of it.
You go through at least the first two years of Star Trek and you find some amazing stuff. Everything that was going on Gene put into the series. He just put strange costumes on the actors and painted them funny colours and left the same situation in.