41 Think of it this way. If a father dies and leaves an inheritance for his young children, those children are not much better off than slaves until they grow up, even though they actually own everything their father had. 2 They have to obey their guardians until they reach whatever age their father set. 3 And that's the way it was with us before Christ came. We were like children; we were slaves to the basic spiritual principles of this world. 4 But when the right time came, God sent his Son, born of a woman, subject to the law. 5 God sent him to buy freedom for us who were slaves to the law, so that he could adopt us as his very own children. 6 And because we are his children, God has sent the Spirit of his Son into our hearts, prompting us to call out, "Abba, Father." 7 Now you are no longer a slave but God's own child. And since you are his child, God has made you his heir.
Matthew Henry's Commentary on Galatians 4:1-7
Commentary on Galatians 4:1-7
(Read Galatians 4:1-7)
The apostle deals plainly with those who urged the law of Moses together with the gospel of Christ, and endeavoured to bring believers under its bondage. They could not fully understand the meaning of the law as given by Moses. And as that was a dispensation of darkness, so of bondage; they were tied to many burdensome rites and observances, by which they were taught and kept subject like a child under tutors and governors. We learn the happier state of Christians under the gospel dispensation. From these verses see the wonders of Divine love and mercy; particularly of God the Father, in sending his Son into the world to redeem and save us; of the Son of God, in submitting so low, and suffering so much for us; and of the Holy Spirit, in condescending to dwell in the hearts of believers, for such gracious purposes. Also, the advantages Christians enjoy under the gospel. Although by nature children of wrath and disobedience, they become by grace children of love, and partake of the nature of the children of God; for he will have all his children resemble him. Among men the eldest son is heir; but all God's children shall have the inheritance of eldest sons. May the temper and conduct of sons ever show our adoption; and may the Holy Spirit witness with our spirits that we are children and heirs of God.