Kakashi holds on to the hope that Obito can return to being the young man that he remembers. But Obito has abandoned the present as well as the memories of his friends and will not try to stop the Infinite Tsukuyomi. Realizing that nothing more can be done, Kakashi comes to a decision to protect the world, while his former friend is determined to end it!
You're just a backup that
I had cultivated for my rebirth.
أنتَ مجرد مساعدٍ ربيته لأجل إعادة إحيائي
Du warst bloß die Reserve, die ich
für meine Wiedergeburt aufgespart habe.
No eres más que un repuesto 
que preparé para resucitar.
No eres más que un repuesto 
que preparé para resucitar.
Eri solo una scorta che tenevo da parte
per la mia rinascita.
Você é o último recurso que cultivei
para a minha ressurreição.