“For I want you to know what a great conflict [struggle] I have for you and those in Laodicea, and for as many as have not seen my face in the flesh, that their hearts may be encouraged, being knit together in love, and attaining to all riches of the full assurance of understanding, to the knowledge of the mystery of God, both of the Father and of Christ, in whom are hidden all the treasures of wisdom and knowledge. Now this I say lest anyone should deceive you with persuasive words.” Colossians 2:1-4.
“I now rejoice in my sufferings for you, and fill up in my flesh what is lacking in the afflictions of Christ, for the sake of His body, which is the church, of which I became a minister according to the stewardship from God which was given to me for you, to fulfill the word of God, the mystery which has been hidden from ages and from generations, but now has been revealed to His saints.” Colossians 1:24-26.
“And you, who once were alienated and enemies in your mind by wicked works, yet now He has reconciled in the body of His flesh through death, to present you holy, and blameless, and irreproachable in His sight – if indeed you continue in the faith, grounded and steadfast, and are not moved away from the hope of the gospel which you heard, which was preached to every creature under heaven, of which I, Paul, became a minister.” Colossians 1:21-23.
“Paul, an apostle of Jesus Christ by the will of God, and Timothy our brother, to the saints and faithful brethren in Christ who are in Colosse: Grace to you and peace from God our Father and the Lord Jesus Christ.” Colossians 1:1-2.
Most expositors believe that this letter, written by the Apostle Paul, was composed during his first imprisonment in Rome.