Karl Barth’s rediscovery of Anselm’s works could rightfully be said to be the turning point in Barth’s pursuit of a means to DO theology. It was after moving to Munster and in preparation for lectures that Barth studied Anselm and eventually produced “Anselm: fides quarens intellectum,” which was considered by Barth to be his most important book. It was Anselm’s definition of God that became the springboard for Barth’s theology. Anselm said, “God is that than which nothing greater can be conceived.”
Sum of all possible perfections. Existence follows. It only works in this instance (Contra. Caunilo). Follows from common reason.