I've noticed that some timeless pieces of literary work capture either the Zeitgeist or predict some great thing. For instance, The Great Gatsby. To me it was a ludicrously boring book but for whatever reason it is popular work. Is this just because it is a reflection of the times? Then you have something like 1984, which is a fear-mongering dystopic prediction inspired by real things (some of which more or less came true). Other great stories have very novel concepts. So what makes a masterpiece?