Actually SkyPilot, while the faith aspect is not pushed to the forefront, it is evident that his faith in Christ is what turned his life around. Obviously to Cash, his faith was first in his life and indeed it would've been nice if it were portrayed a bit stronger in the movie. But then again, this movie was geared for broad appeal.
1. Music
2. Drugs
3. June Carter
4. Jesus Christ
I am drawn to Cash's story because he is "real" - he screwed up a lot in life and sought forgiveness and redemption from God. He didn't join a Karballah cult or go around complaining about the lack of macrobiotic products on supermarket shelves. He was a sinner who turned to God, and he emerged a bigger man than almost anyone in the music business.