That's where a metaphorical God shows its worth. The need to explain becomes unimportant, the word God (and by extension the deity concept) becomes just a thought used to describe another thought. I see no definitive proof one way or the other for a deity, in fact given the traditional interpretation of the concept as some sort of supreme consciousness I find the thought hard to take seriously. However I am not so quick to write off the possibility that
something a little more Obiwan-Kenobi-ish where a unifying force of some yet-to-be-conceived description does exist, and in a form much more worthy of the "God" name than some wizened old gent with a big "G" on his sweatshirt. Just like "Santa" and "Mother Nature" can signify a deeper, more expansive force than a simple human-with-a-few-extras concept, "God" in it's true nature is yet to be adequately described.
You may find the notion of God as a question, a search, drives some debate enthusiasts insane. If you are flexible in your ability to look for answers regarding spirituality, if you have no rigid definition set up that can then be torn down and proven wrong, then your notion of God can't be dismantled. It aggravates some to no end Ive found, almost moreso than if you're a rabid preacher predicting hellfire and damnation and literal adherence to a holy book.