Douglas N. Walton said this quote

“ 1. God is (by definition) a being than which no greater being can be thought.2. Greatness includes greatness of virtue.3. Therefore, God is a being than which no being could be more virtuous.4. But virtue involves overcoming pains and dangers.5. Indeed, a being can only be properly said to be virtuous if it can suffer pain or be destroyed.6. A God that can suffer pain or is destructible is not one than which no greater being can be thought.7.For you can think of a greater being, that is, one that is nonsuffering and indestructible.8. Therefore, God does not exist. ”