Paul mentioned several of the people who worked together with him. Most of them were Gentiles like Onesimus.
Many Jewish believers opposed Paul for preaching that Jesus welcomed Gentiles into God’s family. That was why he was in prison at that time. So it was comforting to Paul to have Jews like John Mark and Justus work with him.
Paul also mentioned several people in churches near Colossae. All these men and women respected and cared deeply for one another. Paul was giving an example of God’s people living in peace as one body.
Paul’s letter ended with instructions to the churches in Colossae and Laodicea. It was common practice for the churches to share his letters. This was another way Paul encouraged believers to be bound together in love.