“You TRY to see a greater meaning behind the slaughter, but there…is only hatred…and pain…and nothing you can do about it. Pointless death…bottomless hatred…unending pain. THAT…is war.” - Nagato
“Motives for war are of no concern. Religion, ideology, resources, land, spite, love, or just because… no matter how pathetic the reason, it’s enough to start war.” - Nagato
“Those who do not understand true pain can never understand true peace.” - Nagato
“We are but men, drawn to act in the name of revenge we deem to be ‘Justice.’ But when we call our vengeance ‘Justice,’ it only breeds more revenge…forging the first link in the chains of hatred.” - Nagato
“It is precisely because we love that we sacrifice… and hate” - Nagato
“When one loves… there is the risk of hate” - Tobi
“Self-sacrifice…A nameless shinobi who protects peace from within its shadow…That is a true shinobi. Shisui taught me that” - Itachi Uchiha
“We don’t know what kind of people we TRULY are until the moment before our deaths. As death comes to embrace you, you will realize what you are. That’s what death IS, don’t you think?” - Itachi Uchiha
“All people live relying on their knowledge and perception, and are thus bound to them. Those boundaries are what they tend to accept as “reality”. However, knowledge and perception are both ambigous, so “reality” could be nothing more than an illusion. People live trapped by their limited perception, do you see?” - Itachi Uchiha
All of them are from Naruto.