[Vampyr]

What's the Catholic/Christian view on doubt? Do you need 100% faith in God and the Bible to go to Heaven? What if you're only 80% sure, but there's a nagging thought that you could be wrong?

I've always wondered how people of any religion, not just Christianity, could have 100% faith, given that you are probably Catholic just because of the geographical region in which you were born and what religion the rest of your family has.