Could you provide a summary of the idea?
Robert Kegan's wikipedia entry has a pretty good summary of the idea.
This 15 min. youtube video is also a nice introduction.
In short, the real reason people don't do the things they consciously want to do might be related to a sort of immune system that tries to keep things as they are because there are competing commitments that steam from unconscious assumptions. e.g. a person might not take their heart medication because taking medication is associated with end of life and they have a competing commitment to not perceive themselves as being at the end of their life.
Does any of you has any relevant experience that you can share with Immunity to change by Robert Kegan and Lisa Laskow Lahey?
I'm currently reading their book and I find it fascinating.