This is what I mean when I say there is no starting point. I feel that believers always try to posit this very point, but it is not valid. We do not operate on faith. We simply lack belief. I do not really know why believers dislike this stance, but I notice that they really do.
I am not sure what you stance is. Whether or not you lack belief in God or whether you do believe there is No-God. That is an important difference, at least to me. Perhaps you see no difference. Is it atheism or agnosticism?
You often refer to logic for your reasoning and anti-logic for ours. We see more logic in what we believe than in what you believe and that seems to lead back to the beginning - Creation. I see no validity in assuming a Big Bang was the beginning because that leads inextricably to the beginning of the beginning - what banged? Yet, it is from that that the rest unfolds. So, I suppose that should be the starting point of these discussions and it often is.
The relevance of gravity, which metmom, brought up, is we know that gravity itself exists, but we don't yet know what it really is, and that is science, not religion. So, scientists and logicians do believe in things they can't see and can't fully explain. They can only observe it and make other calculations about it. The same is true of Christianity but on a different plane. Science deals with concreteness, with numbers and physical experiments, etc. Christianity deals with the abstracts like love, truth, life, beauty, etc. Yes, truth is an abstract. So, aren't we simply talking about in what we have faith? Is it science or is it religion?
Christians have the best of both worlds. We have faith in both. Non-believers are stuck with just science. Do you believe man has a spiritual nature? Do you believe there are recorded and observable phenomena that we cannot explain? I believe that for those who can make that "leap of faith" the Bible has explanations for it all. God is the Big Picture in which science is only a component. Science deals with things. Christianity deals with values.
Does that explain anything of importance?