The Apostle Paul
Romans 8:15BSB·traditional attribution

For you did not receive a spirit of slavery that returns you to fear, but you received the Spirit of adoption to sonship, by whom we cry, “Abba! Father!”

John Calvin Reformed

15. He now confirms the certainty of that confidence, in which he has already bidden the faithful to rest secure; and he does this by mentioning the special effect produced by the Spirit; for he has not been given for the purpose of harassing us with trembling or of tormenting us with anxiety; but on the contrary, for this end — that having calmed every...

Matthew Henry Presbyterian

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

For ye have not received the spirit of bondage again to fear,.... By "the spirit of bondage" is meant, not the Spirit of God: for this is just the reverse of his character, who is a "free Spirit", or , "a Spirit of liberty"; and is contrary to his work and office, which is to show a soul its state of bondage by nature, and...