[To Tobi] If I had to keep my patience with you in a bag, it'd be bursting at the seams! Say another word and I'll make you wish you were never born!
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[To Onoki] When did you all forsake yourselves?
[To Tobi] Peace under an illusion is not true peace. It's only meaningful if the real world manages to accomplish it.
[To Tobi] We won't give up hope.
[To Tsunade about hiding Naruto] I know him well. He takes too many risks when it comes to his friends. That's why.
[To Kankurō, when he asked about how Konoha will overcome Pain's destruction] He was the one who taught me to deepen my bond with my people. Thanks to him, I was able to regain my true self. That village has him, the one who cherishes a friend's bond more than anyone I know. Naruto Uzumaki... Knowing him and the friends he holds so dear, they will overcome this disaster and grow even stronger from it.
My attacks are the slowest in Akatsuki and the least skilled, so I just can't hit anything, seriously.
Jashin, please watch over me, this time, I am really going to do it, I am going to tear their intestines out.
You can't just go around getting killed outta nowhere. Man, you suck!
[To Naruto] You're such a child. You talk of nothing but pipe dreams. There are times when a ninja must make painful choices.
Every human being relies on and is bounded by his knowledge and experience to live. This is what we call "reality". However, knowledge and experience are ambiguous, thus reality can become illusion. Is it not possible to think that, all human beings are living in their assumptions?
[To Sasuke] I don't think something like perfection exists. That is why I think we are born able to absorb things and by comparing ourselves with something else, we can finally head in a good direction.
Flooded with anger, I cry tears of blood! The hermit of the legendary sannin! The toad sage of the mysterious Myoboku Mountain! The great Jiraiya!
[In a letter] Tsunade, a person grows up when he's able to overcome hardships. Protection is important, but there are some things that a person must learn on his own.
[to younger Kakashi] You know, people should talk to others everyday even if its a small talk otherwise their hearts will grow dark and serious. Talking to others builds bonds, and makes you feel grateful that you're alive. That's the kind of creatures we humans are.
These quotes come from Wikiquote's Naruto: Shippūden pages and are available under the Creative Commons Attribution-ShareAlike License.