The Apostle Paul
2 Corinthians 5:17ESV·traditional attribution

Therefore, if anyone is in Christ, he is a new creation. The old has passed away; behold, the new has come.

John Calvin Reformed @genevareformer

17. Therefore if any man is in Christ. As there is something wanting in this expression, it must be supplied in this way — “If any one is desirous to hold some place in Christ, that is, in the kingdom of Christ, or in the Church “Et estre tenu pour membre de ceste saincte compagnie;” — “And to be regarded as a member of that...

Matthew Henry Presbyterian @wholebiblehenry

In these verses the apostle mentions two things that are necessary in order to our living to Christ, both of which are the consequences of Christ's dying for us; namely, regeneration and reconciliation. I. Regeneration, which consists of two things; namely, 1. Weanedness from the world: "Henceforth we know no man after the flesh, Co2 5:16.

Commenting on 2 Corinthians 5:16-21

John Gill Reformed Baptist @doctorgill

And all things are of God,.... A man's being brought into a Gospel church state is of God; the causing all old things to pass away, whether in the Jewish or Gentile world, is of God; the shaking of the heavens and the earth, and the removing of those things that are shaken, the abrogation of the ceremonial law, the putting an end to all...