

In the eleventh century, Anselm and theologians like him began to interact with a larger world of ideas, specifically the Muslim theologians who were challenging some of the central tenets of the Christian faith. In the centuries previous, theology had largely been an increasingly ad intra discussion among the theologians of Christendom. As Muslim writings (and even the occasional Muslim thinker) began their movement into Europe, they began to challenge theological positions which had been taken for granted. It is in this context which Anselm developed his most famous contribution to the world of ideas: the Ontological argument for the existence of God. This argument was Anselm’s attempt to argue for the existence of God from the basis of reason alone, not from the preconceived assumptions of Christian understanding of God. While the argument was challenged almost immediately as flawed, Anselm believed he had demonstrated reasonably the fact of God’s existence. Although the argument has never been that popular, it still has had its advocates: Descartes’ famous cogito is a form of the ontological argument, Alvin Plantinga also advocated a modified form of the argument, and C.S. Lewis uses it in The Silver Chair in the Narnia series (the latest issue of Touchstone has an article on Lewis’ use of the ontological argument). [Read more…] about Cur Deus Homo. An Advent Devotional