Reading: Romans 12:14-21
If you want to get people's attention, say the unexpected. Tell the underclass that the Kingdom of God is meant for them. Tell people that they are blessed if they mourn, or if they are insulted or persecuted (Matthew 5). Jesus said the unexpected, but He did it for more than just getting attention. He did it to expose the heart of a belief system, so that motives and intentions lay bare.
Paul follows suit in these verses. He asks us to do the unexpected-that which is impossible for the world to do. It's not possible for us either, unless by renewing our minds, we are transformed and live inside out.