Danno and McGarrett in “Unfinished Business”

It's a stinking job.

Who told you it was anything else?

He was just a boy, Steve. A boy. Probably never even had to shave.

You think it's easier to kill a grown man? You think the next one'll be easier than this one? God help you if you do. [pauses] It better hurt every time. It better tear your guts out every time you pull that gun, whether you use it or not. You learn to live with it, but don't get used to it.