The ability to show others who are stuck in a cycle of learned helplessness that their view of reality is dangerously warped and far worse than the truth AND be able to deliver some kind of silver bullet-esque thing that makes them want to change themselves for the better.
I coach little league baseball (13-15 year olds) and during our last game I realized I was carrying around my wooden bat like Tom Cruise's character (Lt. Daniel Kaffee) while trying to decide what I needed to do to fix our 4 straight losses. I guess awesome ideas are contagious, even if they are from a movie.
(your quote from a few good men brought me to this train of thought)