In the same way that Paul's greeting is the exact same as the first letter you will notice Paul's benediction is the exact same as the first letter as well. This time however Paul goes on to exhort the new believers to avoid idle individuals. In this context idleness comes from the Greek word ataktos unruly, disorderly or deviating from the prescribed path. Paul is pleading with the new believers to avoid those that are following an unrighteous path. We can see that Paul's writings and guidance are still very much influenced by the notion that God's people need to separate and set apart. Paul than goes on to remind the believers that he has not asked them for much has he as worked to provide his own bread. As Paul concludes his letter he encourages the believers warn any believers that stray from the path, not consider them enemies, but warn them as family. I think this is something we have missed in our culture, i.e. cancel culture