Everyone whether you believe in God or not agree that there's existence of a more superior being to whom we owe our lives and the universe at large. For us Christians, this Superior being is God. Therefore, having mentioned this, how then do we prove that God exists? First and for most there are many natural phenomena which are unexplained no matter which angle we try to explain it using science. A perfect example is life itself. How would you explain how human beings and other animals breath?How and why does it happen and how did they come to start breathing.? Another thing is the Bible or even the Quran. It clearly explains the creation story paying intricate attention to details that its hard to deny the existence of God.