"And now back to your regularly scheduled program."
Even though in my opinion I think Romans 12 is giving instructions to individual believers, I would say that verses 14, 17-21 would have to do with our dealings with unbelievers.
The heaping coals upon someone's head was a good thing....they were bringing back coal for heat in their houses...Tamie pointed that out with cool pictures and everything.
What He Heard
I'm going to make you wish you were dead for the rest of the week.
What She Said
Tell me the truth, honey...do I look fat in this?