Al Pacino is incredible in this movie (well, in this movie too). Colin Farrel isn't bad, but the movie is on Al's shoulder and he just waltz away with it. On more good point: it's worth to check how he never ever tells any solid things about Clayton's father - high five for the script writers!
There's this parish priest, goes up to the Pope, drops down on his knees, starts weeping... asking forgiveness. "Holy father, holy father, what am I to do? what am I to do? I don't believe in God anymore. WHAT AM I TO DO?" And you know what the pope said... "Fake it." But I can't... fake it... anymore!!!! Yeeeeah, is a good film!