Naruto, Sasuke and others in “Unfinished Business”

Naruto

If that's all true then why didn't you kill me that day?! Weren't you gonna break our bond, Sasuke?!

Sasuke

The reason is simple. It's not that I couldn't break our bond, Naruto. [flashes back to the Uchiha clan massacre] I was simply doing as my older brother had done before me. It was nothing more than a strategy to gain power.

Naruto

What are you talking about?

Sasuke

I don't owe you any explanations. All I can tell you is that day... [flashes back to the battle at the Final Valley] That day when I left you lying there, I only spared your life on a whim, nothing more. [appears near Naruto]

Yamato

He's fast.

Sakura

How did he do that?

Sasuke

You know come to think of it, wasn't it always your dream to become the Hokage? All of the time you spent chasing after me would have been better spent in training. Wouldn't you agree, Naruto?

Sakura

Sasuke what are you-

Sasuke

[unsheathing his sword] But this time my whim is telling me to finish what I started.

Naruto

How could I ever become Hokage? I can't save a friend. Isn't that right, Sasuke?