Refection Of Anselm’s Ontological Argument Whether the existence of God can be proved rationally is an important, controversial theological problem in the Western Christian tradition, and St. Anselm was the first philosopher who applied an ontological argument for God's existence. In Anselm’s work Proslogion, he proposed the first ontological argument by arguing that God must exist in the mind, even in the mind of “the fool”, who don’t believe the existence of God. He also mentioned that if the most powerful God exists in the mind, he must also exist in reality—if God fails to exist, then we could imagine something that is greater than God. This would be conflicting: nothing can be greater than a being than which no greater can be conceived.
