When Memory is a Susbstitute for Thinking
I can appreciate this one from experience. The best of us get defensive when it comes to change. A soccer coach once lent be a great book - "The Mental Edge: Maximize Your Sports Potential With the Mind/Body Connection." The author puts it very nicely when he says, "When you do what you've always done, you'll get what you've always got."
I've encountered the defensive attitude so many times in my work - people just don't like to change habits every week. Industrial Logic has an practical approach to this - applying massive change in one go. Its like dipping your toe in really cold water, then your feet, leg and so on, getting tortured each time, as opposed to plunging in and acclimatising instantly. Of course, as the authors point out, you wouldn't want to be "chainsaw Al," who messed up the companies he touched due to his ethics (or lack thereof).