I've been listening to a CD book by Brene Brown who is a "Shame Researcher". She has a couple of fantastic presentations on TED that got me interested (google "TED" and "Brene Brown" if curious).
But I was struck by how much my cult experience caused me to internalize shame and call it guilt. I love how she simply states, "Guilt says, 'I made a mistake'. Shame says, 'I am a mistake'" I've spent a heck of a lot of time thinking I was a mistake because I couldn't be perfect the way the cult taught. So I got stuck in this unrelenting cycle of trying to repent of who I was (as defined by the cult) and never being successful.
If anyone else has had this same problem I can't recommend her work highly enough.