Kolosser 1:20

The Greek order is, "And through Him (Christ) to reconcile again completely (see on Eph 2:16) all things (Greek, 'the whole universe of things') unto Himself (unto God the Father, Co2 5:19), having made peace (God the Father having made peace) through the blood of His (Christ's) cross," that is, shed by Christ on the cross: the price and pledge of our reconciliation with God. The Scripture phrase, "God reconciles man to Himself," implies that He takes away by the blood of Jesus the barrier which God's justice interposes against man's being in union with God (compare Note, see on Rom 5:10; Co2 5:18). So the Septuagint, Sa1 29:4, "Wherewith should he reconcile himself unto his master," that is, reconcile his master unto him by appeasing his wrath. So Mat 5:23-24. by him--"through Him" (the instrumental agent in the new creation, as in the original creation): emphatically repeated, to bring the person of Christ, as the Head of both creations alike, into prominence. things in earth . . . in heaven--Good angels, in one sense, do not need reconciliation to God; fallen angels are excluded from it (Jde 1:6). But probably redemption has effects on the world of spirits unknown to us. Of course, His reconciling us, and His reconciling them, must be by a different process, as He took not on Him the nature of angels, so as to offer a propitiation for them. But the effect of redemption on them, as He is their Head as well as ours, is that they are thereby brought nearer God, and so gain an increase of blessedness [ALFORD], and larger views of the love and wisdom of God (Eph 3:10). All creation subsists in Christ, all creation is therefore affected by His propitiation: sinful creation is strictly "reconciled" from its enmity; sinless creation, comparatively distant from His unapproach…

We have here, I. The inscription, as usual (Col 1:1, Col 1:2). II. His thanksgiving to God for what he had heard concerning them - their faith, love, and hope (Col 1:3-8). III. His prayer for their knowledge, fruitfulness, and strength (Col 1:9-11). IV. An admirable summary of the Christian doctrine concerning the operation of the Spirit, the person of the Redeemer, the work of redemption, and the preaching of it in the gospel (v. 12-29).

1:20 Through Christ, God has reconciled everything to himself, reestablishing his rule over all creation, including both the spiritual and the earthly realms.