One widespread view is that, since reason and observation make it perfectly obvious that the earth is not the stationary centre of the universe, it is quite clear that there could be no justified intellectual opposition to the Copernican theory. Our aim is to examine some of these stereotypes, and to sort out what is correct in them from what is simply mistaken. Ontological arguments do not appeal to any evidence obtained from experience of the world. Instead, they proceed simply from an examination or analysis of the definition, or idea, or concept of God. God is a being which has every perfection.
Existence is a perfection.
I conceive of an existent God. It is possible that it is necessarily the case that God exists. St. Anselm and the argument of Proslogion II . In 1077 and 1078, during the time that he was prior of the Abbey of Bec in Normandy, he wrote two famous theological works, the Monologion and the Proslogion. The latter of these is commonly supposed to contain an ontological argument for the existence of God.