[The obvious, he says, as though he didn't just make an excuse about survival. Vash's nails dig into his hand in frustration. This isn't his planet. These aren't the humans Rem gave her life to save. And yet, it still hurts. There is so much pain and grief and cruelty in the world already. If there was the possibility to avoid adding to it...Vash has always believed that it's worth doing, even when it's hard. The patchwork of scars on his own body are testament to what he's suffered for his mercy, but it's worth it, in his mind.]

Why kill someone who can't fight anymore? Revenge doesn't undo what you've suffered. It won't bring you peace. It just adds more corpses to this awful place.

[Apparently he's voting for "preach" ...]