Commentaries
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.
7. Wherefore—Conclusion inferred from Ga 4:4-6.
thou—individualizing and applying the truth to each. Such an individual appropriation of this comforting truth God grants in answer to them who cry, "Abba, Father."
heir of God through Christ—The oldest manuscripts read, "an heir through God." This combines on behalf of man, the whole before-mentioned agency, of THE Trinity: the Father sent His Son and the Spirit; the Son has freed us from the law; the Spirit has completed our sonship. Thus the redeemed are heirs THROUGH the Triune God, not through the law, nor through fleshly descent [Windischmann in Alford]; (Ga 3:18 confirms this).
heir—confirming Ga 3:29; compare Ro 8:17.