Writing is a solitary existence. Making a movie is controlled chaos - thousands of moving parts and people. Every decision is a compromise. If you're writing and you don't like how your character looks or talks, you just fix it. But in a movie, if there's something you don't like, that's tough.
Dan BrownIn 325 A.D., the Roman Emperor Constantine decided to unify Rome under a single religion ... Historians still marvel at the brilliance with which Constantine converted the sun-worshipping pagans to Christianity. By fusing pagan symbols, dates, and rituals into the growing Christian tradition, he created a kind of hybrid religion that was acceptable to both parties.
Dan Brown