From the "closed" thread, A proof for the existence of God? ... If God is all that powerful He doesn't have to prove anything! ... He just "has" to be! ... And therein lies your answer. If we couldn't "question" the fact that we exist (as God Himself exists), then we couldn't acknowledge anything now could we? So why do we tempt Him to prove that He exists, when all we need to do is prove to ourselves that "we" exist?