The Apostle Paul
Romans 8:11BSB·traditional attribution

And if the Spirit of Him who raised Jesus from the dead is living in you, He who raised Christ Jesus from the dead will also give life to your mortal bodies through His Spirit, who lives in you.

John Calvin Reformed @genevareformer

11. If the Spirit, etc. This is a confirmation of the last verse, derived from the efficient cause, and according to this sense, — “Since by the power of God’s Spirit Christ was raised, and since the Spirit possesses eternal power, he will also exert the same with regard to us.” And he takes it as granted, that in the person of Christ was exhibited...

Matthew Henry Presbyterian @wholebiblehenry

In these verses the apostle represents two more excellent benefits, which belong to true believers. I. Life. The happiness is not barely a negative happiness, not to be condemned; but it is positive, it is an advancement to a life that will be the unspeakable happiness of the man (Rom 8:10, Rom 8:11): If Christ be in you. Observe, If the Spirit be in us, Christ is in us.

Commenting on Romans 8:10-16

John Gill Reformed Baptist @doctorgill

But if the Spirit of him that raised up Jesus from the dead,.... These words are not to be understood as they are by some, of the continued work of sanctification in the heart by the Spirit of God; for regeneration, and not sanctification, is signified by quickening, which quickening occurs when the Spirit of God first takes up his dwelling in the soul; besides...