You should conduct yourselves in a way that matches your new life; so stop doing the harmful things that unbelievers do, and do good things to one another.
17 The Lord Jesus has authorized me to strongly tell you that you must no longer conduct your lives like unbelievers do. The futile/worthless way in which they think [MET] controls how they conduct their lives. 18 They are unable to think clearly [MET] about what is right and what is wrong. Because they have decided that they do not want to know about God and because they stubbornly [IDM] refuse to listen to his message, they do not have the eternal life that God gives us. 19 The result is that because they have ceased ◄to care/to be concerned► about what is right and what is wrong, they have ◄deliberately committed themselves to doing/wholeheartedly decided to do► the shameful things that their bodies want, and they commit all kinds of immoral acts, and continually are eager to do more of those things.