The Apostle Paul
Colossians 2:13ESV·traditional attribution

And you, who were dead in your trespasses and the uncircumcision of your flesh, God made alive together with him, having forgiven us all our trespasses,

John Calvin Reformed @genevareformer

13. And you, when ye were dead. He admonishes the Colossians to recognize, what he had treated of in a general way, as applicable to themselves, which is by far the most effectual way of teaching. Farther, as they were Gentiles when they were converted to Christ, he takes occasion from this to shew them how absurd it is to pass over from Christ to the ceremonies of Moses.

Matthew Henry Presbyterian @wholebiblehenry

The apostle here represents the privileges we Christians have above the Jews, which are very great. I. Christ's death is our life: And you, being dead in your sins and the uncircumcision of your flesh, hath he quickened together with him, Col 2:13. A state of sin is a state of spiritual death. Those who are in sin are dead in sin.

Commenting on Colossians 2:13-15

John Gill Reformed Baptist @doctorgill

And you being dead in your sins,.... Not corporeally, though sin had subjected them to a corporeal death, and their bodies were really mortal, and in a little time must die; but morally, sin had brought a death upon them in a moral sense, they were separated from God, as at death the body is from the soul, and so were alienated from the life...