If you want to just explore faith, there is no shortage of amazing films. Check out the incredible Arts & Faith Top 100 list. A film like 1928’s silent La Passion de Jeanne d’Arc (#1) or the very underrated animated film The Iron Giant (#99) powerfully speak to all kinds of faith.
When I think of films about faith, I think of Paradise Lost 3: Purgatory, a documentary about the West Memphis Three and their 18 year journey towards freedom from their false incarceration (according to the film). While I never saw the earlier two films, this one stands on its own and is a fascinating watch of how to stay strong over decades of injustice.
But when you think movies and faith over the decades, you can’t leave out Rocky Balboa.