Courage takes on a lot of aspects.  Some people will stand in front of an enemy army and not run, but are scared spitless at the idea of walking off a cliff into the unknown.  My cliff was the Shang.  Even after the war, I wanted to fight them.  I didn’t want to admit it at the time, but I was afraid of losing sight of my worldview.  We can’t discover new views if we don’t have the courage to leave where we come from behind.