The existence of God is usually a very hot issue. It all really boils down to faith. Do you believe that nature is random and the world came out of nothing or do you believe that the earth is part of an intelligent design.
I have been on both sides. I have reached the realization that there is a God, but it took a long while for me to come to that conclusion. I have no physical proof but i do have faith. I say this as a non-practicing Christian.
Ask yourself one question: can you see the wind? Yet we all know that the wind is present around us. The same thing with pain. Can you see the pain that you feel?
In my view, God's presence is like pain or the wind. We can feel the evidence of God even when we cannot see Him. That is my two cents' worth anyway. I am well aware that most atheists would differ with me in the absence of physical evidence. I am okay with that though, because i do not require any evidence to believe.