Theme One is a 1967 instrumental piece by George Martin used from 1967 to the mid 1970s as the opening and closing theme tune for BBC Radio 1 and BBC Radio 2.
The main idea is what the story's all about, and the summary is the events of the story. It's the plot, it's what happened. But the theme is a lesson or a message that you can take out of the story and apply to your own life. Themes are universal. That is to say, anyone can relate to them.
Most time a theme is a sentence long or so. But, like wls184p said, it could be long. Themes aren't summaries, they are simply the lesson or what is learned in the story. Basically, although themes can be long, they are mostly short. Show more... Can there be more than one theme of a story?