(http://nutritiondata.self.com/images/home/nutritionIndex.gif)
What is literary nutrition? What is it about literature that nourishes the soul? Well, what is it that makes society better? It is a message, a view about the world that is expressed through the literature. Hey, wait a second, that sounds a lot like theme.
Theme is how literature changes a soul as nutrition changes a body. It refreshes it, maintains it, keeps it alive. What's really cool is how this analogy doesn't break down right away. I mean, what happens if you only eat one kind of food? Let's say that you only eat doughnuts. Is that going to be very nutritious? Nope. And in much the same way commercial fiction is the McDonald's of literature. Basically not theme, and what there is is something that isn't novel, it isn't anything that isn't already in excess like sodium or fat.
But what about the rest of it? Nutrition is a very complicated thing, there's an entire pyramid of different kinds of foods that give different nutrition. One must balance this; more than that, every person's balance is different. Every person enjoys a slightly different balance of food either because there isn't one healthy; after all, who is to say that you can't get your protein from peanut butter and instead must eat steak? And there are different kinds of books to, many, many kinds - horror and adventure, action and mystery, historical and futuristic. So many kinds of books, so many books in each kind. Which to read? Which to explore? So many options, just like looking at a restaurant menu - which I think is where this analogy starts to break. That is now like saying that a restaurant is like a library. Yet is that a break or a bud?
But I digress. Too much food isn't exactly a good thing; let this food for thought digest. Library menus are for another day.