Dean Winchester: We do the ugly things so that people can live happy.

Sam Winchester: Yeah. Yeah. Lucky them.

Dean Winchester: Yeah, lucky them. But it doesn't change a thing. You know what I mean? We still do the job. But we don't do it for us. We did it for Jack, for Mom, for Rowena. We owe it to anybody who has ever gave a damn about us to keep putting one foot in front of the other. No matter what.