Oliver and Felicity in “Unfinished Business”

Oliver

Hey. Come on, we can't just lose all hope here.

Felicity

You have. I can see it in your eyes.

Oliver

I just can't believe that I thought that I'd be the one to unite this city while Damien Darhk was trying to kill it. That was arrogant. The same arrogance that made me feel that I could be the Green Arrow without descending into darkness. Bottom line: it was foolish.

Felicity

You don't believe that.

Oliver

I didn't believe that. Not until Laurel died.

Felicity

I thought you weren't blaming yourself for her death anymore.

Oliver

We made a decision to come back here. I tried to do things differently. And for a time, I did. And now I am left here to wonder... if I hadn't, would Laurel still be alive?