Marty, Elsa J. (19 de agosto de 2010). A Dictionary of Philosophy of Religion. Continuum International Publishing Group. p. 154. ISBN9781441111975. Consultado el 2 de diciembre de 2012. «C.S. Lewis offered a popularized version of such an argument in a series of talks for the BBC during World War II, later published in his Mere Christianity Lewis argued that conscience reveals to us a moral law whose source cannot be found in the natural world, thus pointing to a supernatural Lawgiver.»
Allison, Gregg (29 de marzo de 2011). Historical Theology: An Introduction to Christian Doctrine. Zondervan. p. 207. ISBN9780310230137. Consultado el 2 de diciembre de 2012. «In his highly influential book Mere Christianity, C. S. Lewis revived the moral argument for the existence of God. By moving from the fact of human quarrels and the moral law that these presuppose, to the reality of God as the moral Lawgiver whose law people break, Lewis set forth a foundation not only for the existence of God, but for the message that "the Christians are talking about.... The tell you how the demands of this law, which you and I cannot meet, have been met on our behalf, how God himself becomes a man to save a man from the disapproval of God."».
