If indeed you continue in the faith firmly established and steadfast, and not moved away from the hope of the gospel that you have heard, which was proclaimed in all creation under heaven, and of which I, Paul, was made a minister. (Colossians 1:23 NASB)
The word reconcile means to restore a relationship or cause to coexist in harmony. Reconciliation is needed for mankind because of sin. Reconciliation is provided for mankind on the basis of Christ's sacrifice on the cross. In the 1st chapter of Colossians, we learn some things about this reconciliation that is made possible on the basis of Christ's death on the cross.
For it was the Father's good pleasure for all the fullness to dwell in Him, and through Him to reconcile all things to Himself, having made peace through the blood of His cross; through Him, I say, whether things on earth or things in heaven. (Colossians 1:19-20 NASB)
Before He could die for us, He had to be born for us. The hope of Christmas can be found in a manger in Bethlehem.
He is the image of the invisible God, the firstborn of all creation. For by Him all things were created, both in the heavens and on earth, visible and invisible, whether thrones or dominions or rulers or authorities - all things have been created through Him and for Him. (Colossians 1:15-16 NASB)
For He rescued us from the domain of darkness, and transferred us to the kingdom of His beloved Son, in whom we have redemption, the forgiveness of sins. (Colossians 1:13-14 NASB)
Joyously giving thanks to the Father, who has qualified us to share in the inheritance of the saints in Light.