Your world, which is the real world, and other worlds, the fantasy..
Worlds like this are worlds of the human imagination: their reality, or lack of reality, this is not important. What is important is that they are there. These worlds provide an alternative, provide an escape, provide a threat, provide a dream, provide refuge, and pain. They give your world meaning. They do not exist, and thus they are all that matters.
― Neil Gaiman, The Books of Magic