Only with this kind of humility we can talk to a person of a different creed without arrogance and disregard. Without doubt there is knowledge. The certainty that Lord God the ruler gives reward and punishment leads to obedience. Knowledge is a function of the brain. Faith pierces the whole being of the faithful.
Faith is underlined with doubt.
When we are most certain about our view, then is the time to check it thoroughly. If such a thing was possible, this would be an imperfect god. There always would be a question of the Unprovable One. If he does, then certainly not in the same way as other things that we say that exist. I am responsible for all the thefts in my town, by neglect if not otherwise.