Atheists, how can you live believing what you believe?

I find it hard to believe christians worship a bible filled with books about stories of unicorns, talking snakes, fiery serpents, cockatrices, and invisible super fairies. It doesn't bother me if christians go to eternal torment, history records their acts of genocide and noted perversions of human nature. Your beliefs in fictional people and animals are your beliefs, not mine or the next person's.