Because for God to use you as a leader in your country, or company, or ministry, or family, you need to change your heart. You need to turn over your selfish heart and get a new selfless heart from God.
There is a desperate need for selfless leaders in government, businesses, churches, and families. Here again is the thesis statement of our entire series: The only long-term solution for changing our nation is changing our hearts—one heart at a time.