The Apostle Paul
Colossians 1:6BSB·traditional attribution

that has come to you. All over the world this gospel is bearing fruit and growing, just as it has been doing among you since the day you heard it and truly understood the grace of God.

John Calvin Reformed @genevareformer

6 As also in all the world it brings forth fruit. This has a tendency both to confirm and to comfort the pious — to see the effect of the gospel far and wide in gathering many to Christ. The faith of it does not, it is true, depend on its success, as though we should believe it on the ground that many believe it.

Matthew Henry Presbyterian @wholebiblehenry

Here he proceeds to the body of the epistle, and begins with thanksgiving to God for what he had heard concerning them, though he had no personal acquaintance with them, and knew their state and character only by the reports of others. I. He gave thanks to God for them, that they had embraced the gospel of Christ, and given proofs of their fidelity to him.

Commenting on Colossians 1:3-8

John Gill Reformed Baptist @doctorgill

Which is come unto you,.... That is, the Gospel, which came to them from God, from heaven, from Christ, out of Jerusalem, from whence the word of the Lord was to come, by the ministers of the Gospel, who being sent, came to Colosse, and there preached it; and so the Syriac version renders the words , "which is preached unto you".