For a man named Jesus existing. That's about it. There is no historical reference for Adam and Eve, Noah's ark, all the plagues and genocides that God supposedly inflicted upon us. Not to mention the impossibility to go along with all of those accounts that are ONLY mentioned in the bible. There are a million things impossible with the Noah's ark account. I can list them all if you'd like, but common sense should tell you all you need to know. And it is impossible for human kind to start from two human beings who would create a family tree of incest, yet somehow create a population of 7 billion people with such a diverse gene pool. And you can't forget about the talking animals and inanimate objects along with the brutality of the Old Testament. But, you probably didn't read any of this or if you did, you probably didn't even stop to think about it at all. Oh well, let's hope your kids aren't as delusional as you are.