Lack of change is often attributed to a lack of understanding. Yet in many situations, we know what to do, we just don't do it. Despite this, our first instinct in getting people to change is to teach them something, when really the problem is not an understanding one.One of the reasons why thinking our way into change is limited is that we are lousy self-evaluators. Many of us tend to think we are better at things than we really are - known as a positive illusion, serviced by ambiguity in definitions of good. We don’t necessarily see all the shades involved in being good in different contexts - we may have fixed views or limited perspectives. As a result, we need to get people to see the situation as it is.