"Then those people are right who say that Heaven and Hell are only states of mind?"
"Hush," he said sternly. "Do not blaspheme. Hell is a state of mind — ye never said a truer word. And every state of mind, left to itself, every shutting up of the creature within the dungeon of its own mind — is, in the end, Hell. But Heaven is not a state of mind. Heaven is reality itself. All that is fully real is Heavenly."

The Great Divorce (1944–1945)