Carl Grimes: Back at the prison... when we got attacked... there was a kid, a little older than me. He had a gun. He was... He was starting to put it down, and I-I s... I shot him. He was... He was giving it up, and I... I just... I shot him. I think about him. What I did to him and how... How easy it was to just... kill him.

Rick Grimes: Carl, no. No. What happened... what you'd lost... All those things you had to... All those thing you had to do... You... You... You... You were just... You were just a boy.

Carl Grimes: And you saw it. What it did. How... How easy it got. That's why you changed... why you brought those people from Woodbury in... You brought them in, and we all lived together. We were enemies. You put away your gun. You did it so I could change, so I could be who I am now. What you did then... How you... How you stopped fighting... it was right. It still is. It can be like that again. You can still be like that again.