In Dialogues Concerning Natural Religion Hume explores whether religious belief can be rational. Because Hume is an empiricist, he thinks that a belief is rational only if it is sufficiently supported by experiential evidence. So the question is really, is there enough evidence in the world to allow us to infer an infinitely good, wise, powerful, perfect God? Hume does not ask whether we can rationally prove that God exists, but rather whether we can rationally come to any conclusions about God's nature.