A leader builds excellence. Excellence is "being all you can be" within the bounds of doing what is right for your organization. To reach excellence you must first be a leader of good character. You must do everything you are supposed to do. Organizations will not achieve excellence by figuring out where it wants to go, then having leaders do whatever they have to in order to get the job done, and then hope their leaders acted with good character. This type of thinking is backwards. Pursuing excellence should not be confused with accomplishing a job or task. When you do planning, you do it by backwards planning. But you do not achieve excellence by backwards planning. Excellence starts with leaders of good and strong character who engage in the entire process of leadership. And the first process is being a person of honorable character.
Leaders are honest, they take responsibility for their actions, not bias, inspiring and optimistic. :)