Oliver and Barry in “Unfinished Business”

Oliver

To do what I do, Barry, takes conviction. But more often than not is the will to do what's ugly. Every time I do that, I'm... I'm trading away little pieces of myself. So you asked what's wrong with me. That's... That's what's wrong. Because the part that I'm trading away is Oliver Queen. And lately I've been feeling like there is nothing left. Except the Arrow.

Barry

I think you're full of crap. Look, you've convinced yourself that everything you've been through took away your humanity. But I think it's because of your humanity that you made it through. You wouldn't have survived, much less come out the other end a hero, somebody who wants to do good, if you didn't have a light inside of you.