We can't get our minds around God. I don't think the Christian faith is fundamentally rational, by which I mean it cannot be captured fully by our rational faculties--and in fact, more often than not, confounds them. A God who can be comfortably captured in our minds, with little else for us to find out apart from an occasional adjustment, is no God at all. Expecting faith in God to be rational is often more the problem than the solution.