Paul appealed to us believers while he's still in prison to live a life that exhibits godly character, moral courage, personal integrity, and mature behavior. A life that expresses gratitude to God for your salvation. Paul suffered a lot in prison. This is his loving reminder to us because he learned a lot and his faith for God grew while he is still there.
Let us follow Paul's ways and examples. He was humbled down and totally changed. He was lost but now he's found, by the grace of God. So, with all humility, forsaking self-righteousness and maintaining self-control, bear that unselfish love to others just like Paul did.