Deus e o Diabo na Terra do Sol is an awesome movie from Brazil from 1964, directed by Glauber Rocha, that inspired El Topo and others.

Here's what it's about (from IMDb): The journey is Manuel's, an impoverished farmer who is radicalized after killing his boss who (like evil capitalists do) attempted to cheat Manuel of his wages. Manuel then finds God, in the form of a self-proclaimed Saint named Sebastian. Before long, Sebastian's blood thirsty spell over Manuel is broken by Rosa, Manuel's dutiful (and long-suffering) wife. But soon after they're free from Sebastian's grip, Manuel is seduced by the charms of a charismatic and similarly blood thirsty bandit named Corisco. Such is the way with Manuel, doomed to follow, and it is this theme that strangles the life out of Rocha's film.