Or, put another way, only people who believe are likely to be followed.
As a “leader” one must have the values and principles of the program or organization not just committed to memory, but embedded in the fiber of their being. They must get energy from these things, and thus will transmit energy to others in their world.
To believe you must know, and you must work to be sure that ALL of the people important to the organization also know; that they look through the lens of the values and speak the language of the principles and standards.
True belief in an action, even if the outcome it uncertain, is a mark of a real leader.