Sasuke’s defeat to Gaara, and later Itachi, forces him to realize that he is not strong enough to get revenge against his older brother.
Then I'd better not waste time
and get strong quickly!
!يجب عليّ أن أصبح أقوى بسرعة وألاّ أهدر أيّ وقت
Dann muss ich schleunigst
noch stärker werden!
¡Entonces debo hacerme fuerte rápidamente!
¡Entonces debo hacerme fuerte rápidamente!
Quindi non mi resta che 
sbrigarmi a diventare più forte, che cavolo!
Então é melhor eu não perder
 tempo e ficar forte logo!
Тогда я не должен терять
время и стать сильнее!