What if a person says he's useless and worthless and wants to intentionally mutilate himself by cutting off a pinky finger? He says he never uses it anyway. Is there anything I can say to him? He hasn't done this yet.

Lately this has been a fad among satan worshipers. Does he follow satan?

No, not at all. He's a Christian, in fact. But that's not a good thing to do to yourself. He just keeps talking about how worthless he thinks he is.

It might be a good idea to ask how he would feel differently without his finger