““So a leader must possess unwavering determination to overcome obstacles and accomplish his goals—while remaining open to the possibility that he may have to throw out the plan and try something else. That’s a lot to ask of anyone, but the German military saw it as the essence of the leader’s role. “Once a course of action has been initiated it must not be abandoned without overriding reason,” the Wehrmacht manual stated. “In the changing situations of combat, however, inflexibly clinging to a course of action can lead to failure. The art of leadership consists of the timely recognition of circumstances and of the moment when a new decision is required.”7””