I agree with this one hundred percent, but I have something to add. Remember when Kakashi said that there can be something to fill a hole? That's another moral too. No matter how hard the pain and suffering is, you can heal with someone or something to fill it up. That's what Kakashi tried to tell Sasuke in Part I. If he truly understood what Kakashi had been through, perhaps he would have abandoned the thought of revenge as well. I also think Haku had something to remember as well. True strength emerges from wanting to protect, not hate. That is how Naruto became strong. It is how anyone can become strong. I will continue to love this series to the end of time.