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.
That's why I severed the bonds.
.لهذا قطعتُ الرّوابط
Und deswegen habe ich
alle Bindungen gekappt.
Es por eso que los corté.
Y por eso mismo los corté.
Per questo ho troncato quei legami.
Por isso eu cortei os laços.
Потому я разорвал их.