A Christian puts it this way:
To me, God exists outside of the realm of science we are aware of. The most commonly held theory is that the universe began with a Big Bang type event. Real scientific evidence points to this conclusion. It is also feasible that it was a completely random occurrence, a la quantum physics. Yet even if it was random, there’s still that pesky ‘why’ question that won’t go away (i’m not satisfied by a response that says random implies no need for a why). Like everyone else, I have no definitive answer.
Yet why do I believe in God? It is hard to articulate. I’m no poet. When I see beauty in the world, it makes me feel like there’s something more there. This may just be a product of my evolution, but again theres no proof. I feel closest to God (if he exists), when I listen to Beethoven’s Ninth (another top achievement). Or look out onto the Grand Canyon (as Bob Dylan once alluded to). Yes it is a cliche, but have you watched those old “miracle of life” films recently? I understand the biology and physics that lead to life, but science has yet to fully explain my thoughts or feelings. Also, this belief has nothing to do with a comforting desire for an afterlife. I have no clue, but my best guess is that my after-life will be just like my before-life.
The responses are interesting.