📖 Biblical Definition
Adoption (Greek huiothesia, "placement as son") is the legal-relational act by which God brings believers into His family as full sons and heirs — not slaves, not hired servants, but blood-bought sons of God Himself (Romans 8:15-17; Galatians 4:4-7; Ephesians 1:5). Adoption is distinguished from regeneration (the new birth) and justification (the verdict) — it is the relational positioning of the believer within God’s household, sealed by the Spirit who cries "Abba, Father" in our hearts. Adoption ensures inheritance (Romans 8:17), fatherly discipline (Hebrews 12:5-11), and access (Ephesians 2:18). Every benefit of son-hood — name, status, future estate — belongs to the regenerate. The Christian is not God’s acquaintance; he is God’s heir.
📜 Webster 1828 Definition
God's legal placing of believers as sons and heirs.
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The Pauline doctrine that God, through Christ and by the Spirit, brings believers into His family as full sons (and daughters) — heirs of God and joint-heirs with Christ — sealed by the Spirit's cry of 'Abba, Father.' Distinct from regeneration (new nature) and justification (legal verdict), adoption is the relational placing into the family.
📖 Key Scripture
Romans 8:15 — "For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father."
Galatians 4:4-5 — "God sent forth his Son, made of a woman... to redeem them that were under the law, that we might receive the adoption of sons."
Ephesians 1:5 — "Having predestinated us unto the adoption of children by Jesus Christ to himself."
⚠️ Modern Corruption
Conflated with regeneration or justification, missing the distinct relational warmth Scripture gives to adoption.
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Adoption goes beyond pardon. The justified sinner is forgiven; the adopted son is family. The Spirit cries Abba in our hearts because the legal exchange has become a familial belonging. J. I. Packer called adoption the highest privilege of the gospel.
🔗 Greek & Hebrew Roots
Greek huiothesia — placing as son.
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['Greek', 'G5206', 'huiothesia', 'adoption']
['Greek', 'G5', 'Abba', 'Father (Aramaic)']
Usage
"The Spirit cries Abba; you are sons."
"Adoption is the highest privilege of the gospel."