Oswaldo Mobray: Now, you're wanted for murder. For the sake of my analogy, let's just assume that you did it. Now, John Ruth wants to take you back to Red Rock to stand trial for murder. And if you're found guilty, the people of Red Rock will hang you in the town square. And, as the hangman, I will perform the execution. And, if all those things end up taking place, that's what civilized society calls "Justice."
Oswaldo Mobray: However, if the relatives and the loved ones of the person you murdered were outside that door right now, and after busting down that door they drug you out into the snow and hung you up by the neck, that would be "Frontier Justice." Now, the good part about frontier justice is it's very thirst quenching. The bad part is, it's apt to be wrong as right
John Ruth: (To Daisy Domergue) Well, not in your case. In your case, you'd have it comin'—but, other people, maybe not so much
Oswaldo Mobray: But ultimately, what's the real difference between the two? Well, the real difference is me—the hangman. To me, it doesn't matter what you did, when I hang you I'll get no satisfaction from your death. It's my job. I hang you in Red Rock, I move on to the next town, I hang someone else there. The man who pulls the lever that breaks your neck will be a dispassionate man, and that dispassion is the very essence of justice; for justice delivered without dispassion is always in danger of not being justice