Our Responsibility (6): Paul does his part, even in his absence, to labor for the saints' stability in their faith in Christ (1:24-2:5). He now points out their responsibility ("therefore") with the imperative: "walk in Him." The Colossians are believers who already embraced "Christ Jesus the Lord." But now, they must match their profession with their conduct, and honor Christ as the Lord. One cannot claim Jesus as the Lord and avoid its implications to real life. Hence, Paul, here on out, addresses specific issues (relevant to his audience) where Christ's pre-eminence and His supreme authority must make a real difference. Jesus cannot be the Lord in intellect or in theory only. A high view of Christ must transform our beliefs and our lifestyle and our church life.
Pictures (7): Believers with a high Christology are then pictured as a tree that is firmly rooted, poised for fruitfulness. There is an expectation of a changed life. Paul also adds an architectural picture. Like a building under active construction, Christ's greatness should actively take shape in their lives. All of this should mean growth toward a stronger faith in Christ. Finally, those who live out this knowledge of Christ overflow with gratitude. Christ's lordship isn't a drag to them. As His glad subjects, their lips resound with thanksgiving!
 The verb "receive" is pa-ra-lam-ba-nō (παραλαμβάνω) is often used to describe the reception of the gospel (1 Cor. 15:1; Gal. 1:9; 1 Thess. 2:13). Here, Paul points out the reception of Christ as "the Lord."
 "Walk" is a common metaphor for conduct (cf. 1:10; 3:7; Eph. 4:1, 17; 5:2, 8, 15; cf. also Psalm 1:1; 15:2; 86:11; 119:1). The particular tense used here is imperfective, hence, "walk in Him" depicts a continual action.
 Paul has hinted at this already in this book in 1:10 ("worthy of the Lord, to please Him"), 1:13 ("kingdom of His beloved Son"), 1:16 ("created through Him and for Him") and 1:18 ("head of the body, the church").
 Paul then (2:8-23) addresses the various areas in which they must practically make Christ Lord: philosophy and empty deception, observation of days, worship of angels, self-made religion, etc.
 "Built up" is a continual build (imperfective). "In Him" points to Christ as the Lord, as in "walk in Him" (2:6).
 "Established [be-bai-o-ō (βεβαιόω)]" is to be continually (imperfective) strengthened (cf. Heb. 13:9).