Possibility #1: There is a god, and the bible is more or less right. OK, if I believe this is so, then I will be held accountable to god when I die for my actions as a believer. How do I KNOW there's a god and that the bible is correct? I can have "faith", I can strongly believe it, but how can I KNOW it? I can't. I am limited by my state of being to know for a fact. There are many others of various religions who strongly believe in their way of thinking as much as Christians do, so what makes them any less 'right' than those of a Christian belief system?
Possibility #2: There is no god, and the bible is a book written solely by men, without any actual divine inspiration. How can I KNOW that there isn't a god? How can I know that the bible was just a compilation of man's thoughts and interpretations of circumstances facing the writers? I can't know it, because I can't teleport myself back in time and ask Moses "Did god really say that?" I can read books by others who have deeply researched the subject, where there are as many supporters of the bible's divinity as there are supporters of it's being man-made.
You didn't consider Possibility #3: There is a god/goddess/creator/energy source, but he/she/it did not author the bible, men did that for different reasons, mainly to be able to control the masses. He.she/it does not hold us accountable for anything, because we are just living different experiences in our present bodies, and once this particular life is done, we return to the source and get to try it again if we so choose. He/she/it gave us free will and reason, and all those other qualities which make life a rich and interesting experience. These are just my thoughts.
IC