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.
A smile is used
to carry out a goal...
.ابتسم لتحقيق هدف
Und er versucht, alles durch
ein Lächeln zu erreichen.
Usar una sonrisa para llevar 
a cabo sus objetivos...
Usar una sonrisa para llevar a cabo sus objetivos...
Un sorriso usato per conseguire un obiettivo.
Um sorriso usado para
 completar um objetivo...
Улыбка — цель для достижения цели...