Paul begins his letter to the Colossians with a thorough outline of the mission of The Body of Christ. In order to show the scope and importance of the church, he begins by aligning himself and his fellow servants (namely, Timothy and Epaphras), the saints of Colossae, and the greater movement of God throughout the world.
All of these entities are united under and subservient to Christ, the head of the church and the power of the movement; He is the aim and energy of the mission.
In the first century after Jesus’ ascension, Paul the apostle is working to spread the good news,the mystery that has been revealed through the life, death, and resurrection of Jesus.
Paul travels extensively to achieve this mission. Even so, he cannot be in all places. Although Paul has never been to Colossae, he has heard reports. His fellow minister, Epaphras, has shared the experience of the Colossian believers and, presumably, some of their challenges.
Paul introduces himself and his intention. He takes his time clarifying the mission for him personally and for the Body of Christ at large (of which, the Colossians are key contributors). In grand language, Paul outlines the power of Christ across the history of existence, which is culminating in the opportunity of the Colossian church to come alongside Paul and others to proclaim the gospel with their lives.