Why do you believe in God?

Because there is no other explanation on how the world was created before the "big bang". Because I watched a lot of of shows about God's miracles', I believe in the devil, so if there is the devil there must be God. And I beleve in the devil because he poseeses people. And my own mother heard the exorcism happening and felt the devils presence. Also I think our body is way to complicated to somehow appear. I believe that God answers my prayers.