Dean Winchester: My whole life, I always believed that what we do was important. No matter what the cost, no matter who we lost, whether it was Dad or... or Bobby or... And I would take the hit. But I kept on fighting because I believed that we were making the world a better place. And now Mom and Cas... And I... I don't know. I don't know.

Sam Winchester: So now you don't believe anymore.

Dean Winchester: I just need a win. I just need a damn win.