- Is God real?
- Is God only a figmant of the collective Christian imagination?
- Have we made up God?
I find one really potent argument for the presence of God is his (indirect) reference in all of art, music, casual talk, etc. What I mean is this yearning for eternal love, something transcending the natural, that is apparent in many songs, in paintings, in other things. The surprising thing is that the supernatural theme is so prevalent, even (or rather especially) with people that don't consider themselves Christians.
I know this isn't proof for anything but I find it to be very potent evidence for the reality of God.