In my opinion, there are two things that can absolutely not be carried to the screen: the realistic presentation of the sexual act and praying to God.
Orson Wellesn Italy for 30 years under the Borgias they had warfare, terror, murder and bloodshed, but they produced Michelangelo, Leonardo da Vinci and the Renaissance. In Switzerland, they had brotherly love - they had 500 years of democracy and peace, and what did that produce? The cuckoo clock.
Orson Welles