The Sentinels To the lepers in your head

"I don't think that this is more about, who would do such a horrible thing, though such people exist," Osprey replied to the girl's question. "It's rather a reminder to us that even the greatest, strongest and wisest have their weakness." In other words, don't hold your nose up too high and never take your position for granted. All kind of things could happen. The thing that made trees a step superior to the other kind was knowing their weakness. Many people did not realize it, until it was too late. 

"I find it fascinating that, while our lives are flowing within and our hearts are safely secured, trees wear theirs unprotected and exposed to the world. Odd creatures they are..."