I'm very honored to have a guest post at Sources of Insight from Jim Kouzes on The Top 10 Leadership Lessons. Jim is co-author of the award-winning and best selling book, The Leadership Challenge. The Leadership Challenge was a BusinessWeek best-seller, and has sold over 1.4 million copies in more than twelve other languages. Jim is a foremost researcher, award-winning writer, and highly respected teacher in the field of leadership. The Wall Street Journal has cited Jim as one of the twelve best executive educators in the United States.