But metaphors can be very powerful. And after you create them you cannot always maintain your exclusive ownership. Ideas cannot be reigned in like horses or cached like gold. Once loosed in the world, a metaphor can float like air. Anyone can inhale it, make it their own. But when they exhale, you may not recognize the aroma. Yet, there is nothing you can do it about it. You may still have your metaphor, and maybe you were the first one to ever have it. But now others have it as well, and it is not exactly the same metaphor as you understand it.
Most Holy Metaphor On religion, especially monotheistic religion, as metaphor.