I think there most likely was a "first cause", I mean, all of this around us got here somehow, most likely not by blind chance. Something doesn't appear out of nothing.... I do not believe in the Bible anymore at all. It's far to vague and scattered to be from a One True God, and there is no crystal clear message for all mankind. It just doesn't make any sense to me at all that "God" would have a book written that was so hard to understand and that so many people interpret differently.
The only time I really feel truly spiritual is when I'm in nature. When I see a sunset, a sunrise, a huge mountain, or if I'm under water scuba diving and looking at all the amazing colors and fish, or around animals. This is when I feel like there might be a God.
My conclusion? Simply this: be good to one another. Treat others well and do no harm. What happens after we die is anyone's guess, and yes, it's simply that a guess. No one knows.
So either God does exist or he doesn't. Either way I'm going to live the best life I can, cherishing every single moment, and I'm going to treat people with dignity and respect and try very hard to harm no one intentionally, but the rest? Well, that's for us to find out.