The Apostle Paul
Colossians 1:20ESV·traditional attribution

and through him to reconcile to himself all things, whether on earth or in heaven, making peace by the blood of his cross.

John Calvin Reformed @genevareformer

20. And by him to reconcile all things to himself. This, also, is a magnificent commendation of Christ, that we cannot be joined to God otherwise than through him. In the first place, let us consider that our happiness consists in our cleaving to God, and that, on the other hand, there is nothing more miserable than to be alienated from him.

Matthew Henry Presbyterian @wholebiblehenry

Here is a summary of the doctrine of the gospel concerning the great work of our redemption by Christ. It comes in here not as the matter of a sermon, but as the matter of a thanksgiving; for our salvation by Christ furnishes us with abundant matter of thanksgiving in every view of it: Giving thanks unto the Father, Col 1:12.

Commenting on Colossians 1:12-29

John Gill Reformed Baptist @doctorgill

And by him to reconcile all things to himself,.... This depends upon the preceding verse, and is to be connected with that phrase in it, it pleased the Father, Col 1:19; and the sense is, that it was the good will and pleasure of God from all eternity, as to lay up all fulness in Christ for his chosen people, so to reconcile them to...