John Chrysostom

"And...through Him to reconcile all things unto Himself." Lest thou shouldest think that He undertook the office of a minister only, he saith, "unto Himself." And yet he elsewhere says, that He reconciled us to God, as in the Epistle he wrote to the Corinthians. And he well said, "Through Him to make an end of reconciling"; for they were already reconciled; but completely, he says, and in such sort, as no more to be at enmity with Him. How? For not only the reconciliation was set forth, but also the manner of the reconciliation. …

Homily on Colossians 3 ↗

Ephrem the Syrian

Thus, as peace began to be [established], the angels proclaimed, "Glory in the highest and peace on earth." When lower beings received [peace] from superior beings, "they cried, Glory on earth and peace in the heavens." At that time when the divinity came down [and] was clothed in humanity, the angels cried, "Peace on earth." And at the time when that humanity ascended in order to be absorbed into the divinity and sit on the right—"Peace in heaven"—the infants were crying forth before him, "Hosanna in the highest." Hence, the apostle …

Commentary on Tatian's Diatessaron ↗

Cyril of Jerusalem

These things the Saviour endured, and made peace through the Blood of His Cross, for things in heaven, and things in earth. For we were enemies of God through sin, and God had appointed the sinner to die. There must needs therefore have happened one of two things; either that God, in His truth, should destroy all men, or that in His loving-kindness He should cancel the sentence. But behold the wisdom of God; He preserved both the truth of His sentence, and the exercise of His loving-kindness. …

Catechetical Lecture 13:33 ↗

Thomas Aquinas

Then when he says, and through him to reconcile to himself all things, he shows that Christ is the head of the Church because of an inflow from him. And this is the third characteristic of a head. First, he shows the inflow of grace; and secondly, he explains it. He says therefore: I say that it pleased God not only that this fulness exist in Christ, but that it also flow from Christ to us; and so he says, and through him to reconcile to himself all things: "God was in Christ reconciling the world to himself" (2 Cor 5:19). …

Commentary on Colossians ↗