The Apostle Paul
Romans 8:2BSB·traditional attribution

For in Christ Jesus the law of the Spirit of life set you free from the law of sin and death.

John Calvin Reformed

2. For the law of the Spirit of life, etc. This is a confirmation of the former sentence; and that it may be understood, the meaning of the words must be noticed. Using a language not strictly correct, by the law of the Spirit he designates the Spirit of God, who sprinkles our souls with the blood of Christ, not only to cleanse us from...

Matthew Henry Presbyterian

I. The apostle here beings with one signal privilege of true Christians, and describes the character of those to whom it belongs: There is therefore now no condemnation to those that are in Christ Jesus, Rom 8:1. This is his triumph after that melancholy complaint and conflict in the foregoing chapter - sin remaining, disturbing, vexing, but, blessed be God, not ruining.

Commenting on Romans 8:1-9

John Gill Reformed Baptist

For the law of the Spirit of life in Christ Jesus,.... These words are of difficult interpretation. They may be understood of the Gospel revealing and declaring deliverance from the law of Moses; wherefore there can be "no condemnation", Rom 8:1, by it.