Leadership Lessons teach the aspiring leader that their primary duty is to bring about positive change in the lives of people and the organization they lead, rather than maintaining the status quo, which is usually the work of a manager. This knowledge is fundamental, as the military leader will be called upon in times of crisis or war to develop a VISION and make decisions quickly in order to change a situation that is detrimental to their unit, thereby saving or condemning their men and the freedom of their homeland. In order to do this, the military leader must have physical endurance, knowledge of military duty, familiarity with it, moderation of virtue, persistence in purpose, and understand that usually nothing is required in excess, and that the end crowns the work. But they must also know that all these are the individual aspects of wisdom, which they themselves must acquire and which, as Heraclitus states, consists of one thing: knowing the principle that governs everything with the help of everything.