Today is apparently the 42nd anniversary of Flannery O'Connor's death. Amy Welborn has a lot of links for O'Connor fans. (H/t: Dappled Things)
One of the keys to O'Connor's fiction, I think, is stated by herself at one point: "In my stories a reader will find that the devil accomplishes a good deal of groundwork that seems to be necessary before grace is effective." Grace uses the imperfect, even the bad, to accomplish great things.