Great stuff. I once had a person who was an expert in his area, but refused to share his knowledge with others. It was causing problems and actually made him less valuable, though he thought by doing this it made him more valuable. I approached three people who worked with him and asked if they would sit with him and have an honest conversation about him, his expertise and how his actions affected them. They did. When he came back and we debriefed, he had an ephinany. He now realized how others viewed him. It gave him a better sense of himself and how he had to act and interact. He was now more self aware, but he needed that wake up call. To make this work you need to be open to criticism and change and have people who will tell you the truth and not sugar coat thins.