"Make them live in the future. Biological necessity makes all their passions point in that direction already, so that thought about the future inflames hope and fear. Also, it is unknown to them, so that in making them think about it we make them think of unrealities. In a word, the future is, of all thing, the thing least like eternity. It is the most completely temporal part of time—-for the past is frozen and no longer flows, and the present is all lit up with eternal rays….To be sure [God] wants men to think of the future too—just so much as is necessary for now planning the acts of justice or charity which will probably be their duty tomorrow. The duty of planning the morrow’s work is today’s duty; though its material is borrowed from the future, the duty, like all duties, is in the present. ”

—	C.S. Lewis, The Screwtape Letters