Duchess of Malfi: Belief in Faith

The Cardinal is one of the main characters of the Duchess of Malfi. The Cardinal is one of the highest ranks in the catholic Church. Throughout the play, the Cardinal, who is a Catholic, doesn't make any references to God whatsoever. When ever trouble arouses he doesn't rely on God for anything. There is no prayer, no asking for forgiveness. Nothing. I don't really know where I'm going with this, but I do find this rather interesting. And personally I'm not so sure to why this is the way it is. Just something I've noticed.