I'm sure it's possible. At present I'd describe myself as agnostic, but veering towards Atheism. When I was younger I had SOME belief in the hereafter - mainly because my dad died when I was 10 and I couldn't face thinking that he had just completely ceased to exist. I was never what you'd call religious, but I had to believe his soul/spirit/call it what you will was still around looking over me and I still (nearly 30 years later) find myself driven by an urge to make him proud. Whether or not that equates with a belief in God I don't really know.
As time goes by, my preparedness to believe in the existence of some unseen almighty being gets less and less. If one can approach the contrasting theories of creationism and evolution without emotion or preconception (a very difficult thing to do), I'd have to say the latter makes a lot more sense to me than the former, and there seems to be rather more evidence for it.
One thing's for sure though. If there really is no god (small 'g' intentional), then the thousands of years of various religions have been one hell (pardon the pun) of a con trick.