I recently listened to apologist Peter S. Williams (blog) deliver this talk at the 2010 European Leadership Forum on the topic: Arguments for Theism, and finally understood the Ontological Argument for God’s existence.

However, it brought up a question in my mind, which I submitted to William Lane Craig’s website. I’ll post the answer if I get one, but here’s the question:

If the Ontological Argument assumes that God is the maximum quality of attributes of goodness and greatness:

  1. Which category does ‘being’ or ‘existence’ fall into? Goodness or greatness?
  2. If that is an attribute of greatness, could we not then use this argument to argue for the existence of a maximally great and maximally evil (instead of good) being, then conclude that that being must also exist?