This quote from Paul Lisicky in an essay at The Millions neatly sums up why it can be so difficult to teach Flannery O’Connor’s work:

…it’s so easy to simplify O’Connor. Even sophisticated readers are prone to missing out on all the nuances in the work. First timers tend to read the stories as satire. Yes O’Connor is poking fun, but she also believes in her characters’ capacity to change–that’s what distinguishes her from a satirist. In the classroom I spend a lot of time talking about all the complexities inside those moments of grace. Those moments…always manage to demolish a simple interpretation, and that’s what’s astonishing about them. You can’t tame the stories, they refuse to sit still, refuse good manners, and you’re not paying full attention if you’re not destroyed a little by them.