Question: Okay I saw today's (yesterday's) post on the blog about creating a good lie, but doesn't fiction have to have some kind of truth, too? I mean, if it doesn't make a statement, why write it at all????
Answer: Yes, fiction has to have a theme and the theme is, basically, what the story says. For instance, my novel Ghost Dancer, is a romance and there's lots of love story there, but the theme -- what the story really says -- is, "With faith, all things are possible."
So fiction does have to hold a truth that becomes evident as the story unfolds.
Most of my face-to-face students used to look at me as if I'd sprouted warts when I said, "Fiction has to hold real truth." and "Nobody can tell your truth, but you." But, basically that's what I believe.
All fiction (yes, even daffy romances about debutantes and Indian shamen) must have something to say. The key for you, or any writer, is to figure out what you want to say. That's your theme.
How you get it across is a matter of technique, and a matter of telling your shared truth in a way that only you can tell it. For instance, "Cinderella" says "Love conquers all." I doubt it if really did. Just look at the sad life of Princess Diana. I'll bet Cindy would have had a biiiig mother-in-law problem. But in the story, love conquered all and that can be summed up in one line. If you can't one-line your theme, it usually means you're not focused enough on what the story really says.