The slave in possessing Christ is free in heart. The master knows that he has a Master. The authority is exercised with grace and love.
The apostle ended this epistle with general exhortations. The saints should continue in dependence and communion with God with watchfulness.
The believer must not allow anything which the world, who seek occasion against the truth, could use in that way. We must walk in wisdom.
Paul depended upon them for their prayers. They were to make use of their time. The natural man, overcharged with the things of this world, has no reason to redeem the time, but the believer is looking ahead to a better day in heaven and is laying up now.
Tychicus was to carry a testimony of the interest that the apostle had for the saints. Mark, who had drawn back in a past time, was commended by Paul. With Demas there was no special interest. Tychicus no doubt carried both the letters to Ephesus and Colosse at the same time for the Apostle Paul.