I believe that I don't know what's up there, and never will. The Bible has some great moral stories in it, and it's filled with wise knowledge, but I don't think they were fully true (some are, but perhaps exaggerated and put in good context).
I believe in GOOD and BAD. No matter how cynically you look at it (i.e. us just being nature's creation, nothing really matters), some things are good, and some things are bad. My motivation is to be good.