In less civilized worlds, Fire is often considered to be the combustion of carbon and a gas, often oxygen. This is, as many natives have put it, horsespit. Fire is often the being with the shortest lifespan. It comes from nothing, and returns to nothing. It crawls slowly, generally being content to nibble upon the sticks fed to it by it's captors. But sometimes, fire is slighted. It rears up in anger, consuming all in it's path.
Don't play with fire.