Cameron found another good Mark Twain quote about courage: "Courage is resistance to fear, mastery of fear - not absence of fear." --Mark Twain
I'm reminded of something in one of my favorite movies, Angus. In one of the more touching scenes the protagonist's grandfather says that Superman isn't brave. Superman is invincible and therefor has nothing to lose. True courage is knowing you could lose everything and still doing what you think is right. Also the soundtrack kicks ass.