In some ways, music is a lot like literature. It can be pleasing, enlightening, even life-changing. A great song, like a great book, affects the listener in unanticipated ways and resonates long after the music has ceased. And, if done well, both music and literature have a rhythm and tone unique to their authors; you wouldn't confuse a passage from a Charles Dickens novel with one from a Harry Potter book, nor would you mistake a verse from "A Hard Day's Night" for one from a Lady Gaga songs