St. Paul began ‘Colossians’ by referring to his prayers for them (1.3). He now urges them to devote themselves to prayer and humbly asks them to pray for him! The Apostle is under no illusion that his work’s effectiveness depends on God ‘opening doors’ and prayer is the key. He wants to be clear in proclaiming the “mystery of Christ” and explains what he means by this in vs. 5-6. The way believers speak to “outsiders” should mirror their gracious treatment of one another (cf. 3.12 – 4.1). Warm final greetings illustrate the love St. Paul has been writing about.