"Somewhere inside of me?! Take a good look, there's nothing inside of me anymore!!! I don't feel pain, I don't feel anything! You need to let that guilt go Kakashi. This wind hole wasn't your doing... It was made by this evil, cruel world."
"Now there's something I understand a little better. Hate, sadness, even joy. To be able to share it with another person... Naruto Uzumaki. From fighting him I learned that. He knew pain like I did and then he taught me that you can change your path. I wish that one day I can be needed by someone. Not as a frightening weapon... But as the sand's Kazekage."
"People are weak. They have no fangs or claws. All they can do is cry. And yet, how was it that this world came into the possession of humans? That's because... among all living things... they are... the cruelest!"
"Man seeks peace, yet at the same time yearning for war... Those are the two realms belonging solely to man. Thinking of peace whilst spilling blood is something that only humans could do. They're two sides of the same coin... to protect something... another must be sacrificed."
"There probably isn't any meaning in life. Perhaps you can find something interesting to do while you are alive. Like how you found that flower. Like how I found you."