You wish to see the distant realms? Very well. But know this first: the places you will visit, the places that you will see, do not exist. For there are only two worlds — your world, which is the real world, and the other worlds, the fantasy. Worlds like this are worlds of human imagination: their reality, or lack of reality, is not important. What is important is that they are there. These worlds provide an alternative. Provide escape. Provide a dream, and power, provide refuge, and pain. They give your world meaning. They do not exist; and thus they are all that matters. Do you understand?
Titania, The Books of Magic