📖 Biblical Definition
Christological heresy teaching that Jesus was an ordinary human who was adopted by God as His Son at a particular point in His life. The principal historic forms: (1) Dynamic monarchianism (second-third century, the form represented by Theodotus of Byzantium at Rome and Paul of Samosata at Antioch; condemned at the Synod of Antioch 268-269): Christ is a mere man on whom the divine power (dynamis) descended at His baptism, making Him divine by adoption rather than by eternal generation. (2) Spanish Adoptionism (eighth century, the form represented by Elipandus of Toledo and Felix of Urgel during the Muslim-Christian Iberian context): Christ as God is the natural Son of the Father; Christ as man is the adopted Son. The position was an attempt to safeguard the substantive humanity of Christ against perceived Monophysite tendencies but functionally split the one Person of Christ into a divine natural Son and a human adopted Son; condemned at the Council of Frankfurt (794) and the Roman Synod (798). (3) Various modern forms: theological liberalism's adoptionist Christology (Schleiermacher and successors treating Jesus as the supreme religious genius whom God acknowledges as Son but not as the eternal Son in substantive incarnation); some Unitarian and Jehovah's Witnesses Christologies (treating Jesus as created being adopted to divine sonship). The orthodox Trinitarian-Christological confession (Athanasian Creed, Chalcedonian Definition) maintains that Christ is the eternal Son of God in substantive incarnation, not an adopted man. The Reformed-confessional tradition rejects Adoptionism in all forms.
📜 Webster 1828 Definition
Christological heresy: Jesus an ordinary human adopted by God as His Son at a point in His life; historic forms (dynamic monarchianism, Spanish Adoptionism, modern liberal Christology); condemned by orthodox tradition.
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ADOPTIONISM, n. (Christological heresy) Jesus was ordinary human adopted by God as Son at point in His life (typically baptism, sometimes resurrection). Historic forms: (1) Dynamic monarchianism 2nd-3rd c. (Theodotus of Byzantium at Rome; Paul of Samosata at Antioch, condemned Synod of Antioch 268-269): Christ a mere man on whom divine dynamis descended at baptism. (2) Spanish Adoptionism 8th c. (Elipandus of Toledo, Felix of Urgel): Christ as God is natural Son; Christ as man is adopted Son; condemned Council of Frankfurt 794 and Roman Synod 798. (3) Modern forms: liberal Christology (Schleiermacher etc.); Unitarian; Jehovah's Witnesses. Orthodox confession: Christ is eternal Son of God in substantive incarnation, not adopted man. Reformed tradition rejects in all forms.
📖 Key Scripture
John 1:1-3 — "In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. All things were made by him; and without him was not any thing made that was made."
John 1:14 — "And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth."
John 17:5 — "And now, O Father, glorify thou me with thine own self with the glory which I had with thee before the world was."
Philippians 2:6-8 — "Who, being in the form of God, thought it not robbery to be equal with God: But made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men."
⚠️ Modern Corruption
Adoptionism: Jesus is an ordinary human adopted as God's Son rather than the eternal Son in substantive incarnation; condemned in all forms by orthodox tradition.
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Adoptionism's substantive corruption is the denial of the eternal Sonship of Christ. Scripture is unambiguous: the Son existed before the incarnation (John 1:1-3, the Word was with God in the beginning); the Son had glory with the Father before the world was (John 17:5); the Son took on human nature in the incarnation, not as a created being elevated to sonship but as the eternal Son taking on what He was not (Philippians 2:6-8, who being in the form of God, made himself of no reputation, and took upon him the form of a servant). All forms of Adoptionism — whether the early dynamic monarchianism, the eighth-century Spanish form, or the modern liberal version — collapse this eternal Sonship into a temporal adoption. The orthodox Trinitarian confession is rigorous: the Son is eternally Son; eternally generated, not created; eternally consubstantial with the Father; never adopted into Sonship because never anything other than the eternal Son.
🔗 Greek & Hebrew Roots
Christological heresy; multiple historic forms (dynamic monarchianism, Spanish, modern liberal); condemned in all forms.
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['Latin', '—', 'adoptio', 'adoption']
['Greek', '—', 'dynamis', 'power (root of dynamic monarchianism)']
['Latin', '—', 'filius adoptivus', 'adopted son (the Spanish-Adoptionist designation)']
Usage
"Adoptionism: Jesus an ordinary human adopted as God's Son, not the eternal Son in substantive incarnation."
"Historic forms: dynamic monarchianism (2nd-3rd c.); Spanish Adoptionism (8th c.); modern liberal Christology."
"Condemned in all forms by orthodox tradition; rejected by Reformed-confessional tradition."