One takes place in the world, the other is an invention of the mind also known as willing suspension of disbelief. (religion.blogs.cnn.com)
That depends on willing suspension of disbelief. (newscientist.com)
Coleridge asked readers of his fantastical poems, including The Rime of the Ancient Mariner, to give him «that willing suspension of disbelief for the moment, which constitutes poetic faith.» (scientificamerican.com)