Team Kakashi are stunned to learn that Sai's true mission is to kill Sasuke.  Naruto wants to believe that the smile Sai showed them was real, but there is a possibility that it was all an act.
You're weak...
...وسبب ضعف
Und weißt du, warum?
Weil es dir an Hass mangelt.
Eres débil,
Eres débil
E lo sei perché... 
il tuo odio non è abbastanza.
Você é fraco...
Почему?