Summary
Paul begins by explaining that an heir, while a child, is no different from a servant, yet under the father’s authority until maturity (v.1‑2). He then recounts how humanity, like children, was enslaved to the elements before Christ’s fulfillment (v.3‑5). With Christ’s arrival, believers are redeemed, adopted, and receive the Holy Spirit, becoming sons and heirs of God (v.6‑7). Paul urges the Galatians to abandon the weak, worldly elements and not revert to legalism (v.8‑10), emphasizing their new identity and urging obedience (v.11‑20). He then draws the biblical parallel of Abraham’s two sons—one by a bondwoman (Ishmael) and one by a free woman (Isaac)—to illustrate the covenantal choice between law and promise (v.21‑23). Paul identifies the bondwoman with the old covenant (Mount Sinai, Jerusalem below) and the free woman with the new covenant, urging the Galatians to reject the former and embrace the latter (v.24‑31).