Koenma quotes from Yu Yu Hakusho: Ghost Files (newest)

Jorge: One battle had come to an end. However, as long as people live, they must continue to fight against something. And no one can forfeit his own fight.
Koenma: Jorge, what are you talking about with such a straight face?
Jorge: The narration!

Koenma: The ambitions of a man who does not care about self-preservation... They bring about tremendously destructive actions that engulf not only those around them, but themselves as well.