 this leper comes and says, you can cure me if you want, you can cleanse me if you want. And here he uses the word to make me clean too, which was a thing specific to the temple. You didn't get cured of leprosy, you got cleansed. They believed there was this moral taint with leprosy. I remember talking to Rabbi Lefkowitz about this, and I've never quite understood it, but there's a moral taint in Orthodox Judaism to leprosy.