Rock Lee: A dropout will beat a genius through hard work.

Kakashi: [introducing himself to his students for the first time] I am Hatake Kakashi. I have no intentions of telling you my likes and dislikes. As for my dream... I have few hobbies.

Naruto Uzumaki: Believe it!

Itachi Uchiha: [to Sasuke] Foolish little brother... If you wish to kill me, curse me! Hate me! And survive your miserable life... Run away, run away... Cling to life.

Naruto Uzumaki: Everyone... everyone... has risked their lives to come after you!
Sasuke Uchiha: Well, how good for them

Deidara: Art is... with a BANG!

[when kidnapping Naruto]
Kisame Hoshigaki: Hmm... Itachi... it would be annoying if he moved around a lot. Perhaps we should cut off a leg or two?