The Power and the Glory by Graham Green

The story of a "whiskey priest" in a state of Mexico that was executing priests. This priest is conflicted, knowing he is unworthy, having committed a mortal sin and fathered a child who he loves but barely knows. And yet unworthy as he is, he still is the only priest around and is unable to run away from his duty. Hardly a saint, hardly a martyr, lustful and intemperate, he represents something greater than himself and he gives hope to poor believers who overlook his flaws, needing what he can give, confession and the sacraments.