Review ... Anything !!

Although Sasuke becomes content with a life of happiness in Konohagakure, he never allows his ambition to gain power to leave his thoughts. During his Part I battles with characters such as Haku and Gaara, Sasuke tests his abilities against those of progressively stronger ninja, in the process discovering the weakpoints he needs to overcome. While initially complacent with his development, Naruto quickly starts to grow stronger at a faster rate. This, coupled with his quick defeat by Itachi during a brief return to Konoha, leads Sasuke to believe that his growth is slowing. In an attempt to reassess his strength, he begins to treat his friends as opponents so as to test his abilities against their own.

Dissatisfied with his progress in Konoha and believing Orochimaru holds the keys to getting strong enough to kill Itachi, Sasuke defects from Konoha at the end of Part I. Naruto attempts to stop him, but Sasuke, believing the death of Naruto, his closest friend, will give him the power he desires (as he was told by Itachi), tries to kill him instead.He is ultimately unable to follow through with this idea, because he felt that is what Itachi would have wanted him to do, and instead continues on to Orochimaru.In the two-and-a-half years he spends with Orochimaru, Sasuke's goal to kill Itachi takes precedence above all else; he even claims he is willing to give his body to Orochimaru if it means killing Itachi, but later turns on Orochimaru after reaching the conclusion that he can learn nothing else of value.After achieving his goal of bringing about Itachi's death, in the process learning how his brother was manipulated by Konoha's higher ups, Sasuke abandons all of his hate for Itachi and resolves to destroy Konoha for both of their sakes. ^"