Is John Piper saying arming oneself is a sin? This paragraph is ambiguous. He acknowledges "situational ambiguities," but then he offers a number of reasons why someone "living the tenor of the Christian" life shouldn't ever kill. In which case, there are no situational ambiguities. His #2 argument almost carries water, except I dispute the point that a bad guy in a back alley, trying to kill and rape my family, is simply an "unjust situation." #3 argument: I dispute that every act of violence against a Christian is necessarily an act of persecution. #4 doesn't deal with self-defense. #5: Does loving my enemy mean letting my wife and daughter be killed and raped? Is the most loving act I can do for my enemy is letting him satiate his lusts? #6: Piper again confuses persecution with self-defense situations. #8.1 He says the NT 'resists that ethical reduction," but then he goes on to give just such a thing. 8.4 is just confusing. Let's pursue it: (8.4*) Is Piper saying calling the police is an okay thing? He doesn't really make it clear but I will give him the benefit of the doubt. (8.4') When the police get there--if they get there in time--they will probably kill the assailant. My actions in calling the police led to the assailant's dying. Even though on his quasi-anabaptist ethics, where the state has the right to kill, the bad guy is still dead and I am partly the reason. I'm not sure the end result, on his principles, is any better. 8.6 "nd I would be very slow to condemn a person who chose differently from me." I'm glad he said this, but it raises some problems: (8.6*) If I arm myself and proverbially kill the bad guy, did I sin? If yes, will I be placed under church discipline?