You can't help but being mesmerized by Robert Duvall in the title role. He must of seen a lot of southern preachers as he grew up, because he wrote this as well and the role suited him to a tee.
The supporting cast is fine, with Rick Dial and John Beasley getting kudos for their work, but the movie is first and foremost about The Apostle. If you like Robert Duvall as an actor, you will like this movie. His attention to detail in his roles is well known. He brings quirks and nuances to help flesh out his characters, and this role is no different.
The Apostle is a flawed man who can lift others up, but has trouble lifting himself up. And that contradiction is what gives this movie its flavor. All-in-all, a fine movie.