Question

Did Jesus take on a human nature at the incarnation, or did he always have one?

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The New Testament describes the Son, who already existed "with God", as *becoming* flesh at a point in history: "born of a woman" and "made like his brothers". It does not describe him as human before that. Most Christians therefore hold that he took on a human nature at his conception. A minority of views read the texts differently.

What the text says

Before: the Word with God. John opens with "In the beginning was the Word, and the Word was with God, and the Word was God" (John 1:1–3). Paul says all things came "through" the one Lord Jesus Christ (1 Corinthians 8:6). He also speaks of Christ "existing in the form of God" before he "made himself nothing" (Philippians 2:6–7). Jesus prays for "the glory I had with you before the world existed" (John 17:5). None of these passages calls the pre-existent Son a man or says he had flesh.

Then: a change at a point in time. The key verbs describe something beginning:

  • "The Word became flesh and dwelt among us" (John 1:14).
  • "God sent his Son, born of a woman, born under the law" (Galatians 4:4), "born of the seed of David according to the flesh" (Romans 1:3).
  • He was "taking the form of a servant, being made in the likeness of men" (Philippians 2:7).
  • "Since the children share in flesh and blood, he himself likewise partook of the same things" (Hebrews 2:14). He "had to be made like his brothers in every respect" (Hebrews 2:17).
  • "A body you prepared for me" (Hebrews 10:5).

Luke places the start of this at the conception by the Holy Spirit in Mary (Luke 1:35). He then describes a real human life of growing "in wisdom and stature" (Luke 2:52).

After: still human. The risen Jesus has "flesh and bones" (Luke 24:39). Paul, writing after the ascension, calls him "the man Christ Jesus" (1 Timothy 2:5). The same passages also insist he did not stop being divine: "in him the whole fullness of deity dwells bodily" (Colossians 2:9).

Read together, these texts most naturally say the Son existed eternally as God, began to be human at a specific moment, and stays human. Some verses can be read another way. Paul calls Christ "the second man... from heaven" (1 Corinthians 15:47), and Jesus says the Son of Man "came down from heaven" (John 3:13; 6:38). There are also Old Testament scenes where a divine figure appears in human form (Genesis 18; 32:24–30). These are where the alternative views below start.

Where readers differ

He took on a human nature at his conception (classical view: Catholic, Orthodox and most Protestant churches)

The eternal Son, fully divine, added a complete human nature (body and rational soul) at his conception in Mary. He was not human before. Since then he is one person with two natures, and he remains human for ever. Holders point to the language of becoming, taking, being born and partaking. They argue that 'from heaven' (1 Corinthians 15:47; John 3:13) names where the *person* came from, not the material of his body. Hebrews 2:14–17 requires his flesh to be the same as ours.

John 1:14Galatians 4:4Philippians 2:6Hebrews 2:14Hebrews 2:17Hebrews 10:5Luke 1:351 Timothy 2:5

His humanity or flesh came from heaven ("heavenly flesh" views)

Some early and sixteenth-century writers held that Christ's flesh did not come from Mary's substance. In their view it was a heavenly humanity that passed through her, or one that already existed in some form. They cite 'the second man is from heaven' (1 Corinthians 15:47), 'the bread that came down from heaven... is my flesh' (John 6:51), and 'no one has ascended into heaven except he who descended' (John 3:13). They see this as protecting Christ's sinlessness. Critics answer with Romans 1:3 and Galatians 4:4, which tie his flesh to David's line and to a woman.

1 Corinthians 15:47John 3:13John 6:51John 6:38

Pre-incarnate appearances and an eternally intended humanity

Many who hold the classical view also believe that the 'angel of the LORD' and similar figures were appearances of the Son before he became human. Examples include the man who ate with Abraham (Genesis 18), the man who wrestled Jacob (Genesis 32:24–30) and the commander before Joshua (Joshua 5:13–15). Some go further and say that God's eternal plan was always for the Son to be the incarnate Christ, 'foreknown before the foundation of the world' (1 Peter 1:20). So in God's purpose his humanity is not an afterthought. Most holders of this view still say the actual human nature began at the conception. They treat the appearances as temporary forms, not a lasting humanity.

Genesis 18:1Genesis 32:24Joshua 5:131 Peter 1:20Ephesians 1:4

He did not exist before his conception (biblical unitarian and Socinian view)

A minority of Christians read Jesus as a fully human being who began at his virgin conception. On this view he never had a non-human pre-existence, so the question of 'taking on' humanity does not arise. They cite 'a man attested to you by God' (Acts 2:22), 'the man Christ Jesus' (1 Timothy 2:5) and the conception as the start of the Son of God (Luke 1:35). They read John 1 as God's word or plan becoming embodied, and John 17:5 as glory held in God's foreknowledge. Opponents point to Philippians 2:6–7, John 8:58 and 1 Corinthians 8:6 as plain statements of personal pre-existence.

Acts 2:221 Timothy 2:5Luke 1:351 Peter 1:20

The words it turns on

  • σάρξ σάρξ (sarx)

    Flesh: physical, mortal human existence, often with a sense of weakness. In John 1:14 it means real human life, not just a body worn like clothing.

    Drift: English 'flesh' can sound merely physical. John's word covers the whole frail human condition, which is why the classical view says Christ took a human mind and soul as well as a body.

  • γίνομαι γίνομαι (ginomai), ἐγένετο

    To come into being, to become. John 1:1–2 uses ēn ('was') for the Word's continuous existence. John 1:14 switches to egeneto ('became') for the flesh.

    Drift: 'Became' does not mean the Word stopped being what he was. The contrast between 'was' and 'became' in John 1 marks something new beginning.

  • σκηνόω σκηνόω (skēnoō)

    To pitch a tent, to dwell in a tent. It echoes God's presence in the wilderness tabernacle.

    Drift: 'Dwelt' loses the tabernacle image: God taking up residence among his people in a human body.

  • μορφή μορφή (morphē)

    Form: the outward expression of what something really is. In Philippians 2:6–7 it is used both for 'form of God' and 'form of a servant'.

    Drift: In modern English 'form' can mean mere appearance. In the passage the two parallel uses imply he was really God and really a servant.

  • ὁμοίωμα ὁμοίωμα (homoiōma)

    Likeness, a corresponding form (Philippians 2:7; Romans 8:3).

    Drift: 'Likeness' is sometimes read as 'only looked human'. Paul uses it for real correspondence, and Hebrews 2:17 says 'like his brothers in every respect'. In Romans 8:3 the word is chosen carefully: 'the likeness of *sinful* flesh', real flesh but not sinful.

  • κενόω κενόω (kenoō)

    To empty, to make of no effect. 'He emptied himself' (Philippians 2:7). Paul explains it straight away: 'by taking the form of a servant'.

    Drift: 'Emptied himself' is often taken to mean he gave up being God. The verse describes the emptying as an act of taking something on, not of subtracting divinity.

  • μετέχω μετέχω (metechō)

    To share in, partake of (Hebrews 2:14). He took part in the same flesh and blood the children already had.

  • מַלְאָךְ מַלְאָךְ (mal'akh)

    Messenger, angel. It is used for the 'angel of the LORD', who sometimes speaks as God himself (Genesis 16:13; Exodus 3:2–6).

    Drift: 'Angel' now suggests a winged creature. The Hebrew word names a role (messenger), which is why some readers identify this figure with the pre-incarnate Son.

What the Bible doesn't say

The Bible never uses the technical vocabulary of later doctrine. Phrases like 'human nature', 'two natures' and 'hypostatic union' come from the councils of the fourth and fifth centuries, especially Chalcedon in 451. They try to summarise the texts and are not quotations from them. Scripture also does not explain how the Old Testament appearances of a divine figure in human form relate to the later incarnation. It does not say how the Son's divine and human minds related during his earthly life. And it does not describe exactly what his risen humanity is made of, beyond 'flesh and bones' (Luke 24:39) and a 'spiritual body' (1 Corinthians 15:44). Traditions legitimately differ on these finer points.

Key verses

  1. John 1:14

    The Word became flesh and made His dwelling among us. We have seen His glory, the glory of the one and only Son from the Father, full of grace and truth.

    The Word, who already 'was' (1:1), 'became' flesh. This is the clearest statement that his humanity had a beginning.

  2. Philippians 2:6

    Who, existing in the form of God, did not consider equality with God something to be grasped,

    He existed in the form of God, then 'took' the form of a servant, being made in human likeness.

  3. Galatians 4:4

    But when the time had fully come, God sent His Son, born of a woman, born under the law,

    The Son was 'sent' and then 'born of a woman', which ties his humanity to a birth in history.

  4. Hebrews 2:14

    Now since the children have flesh and blood, He too shared in their humanity, so that by His death He might destroy him who holds the power of death, that is, the devil,

    He 'partook' of flesh and blood because the children already shared it. His humanity was added and was the same as ours.

  5. Hebrews 2:17

    For this reason He had to be made like His brothers in every way, so that He might become a merciful and faithful high priest in service to God, in order to make atonement for the sins of the people.

    He was 'made like his brothers in every respect', which rules out a different or merely apparent humanity.

  6. John 1:1

    In the beginning was the Word, and the Word was with God, and the Word was God.

    Establishes that the Word existed, was with God, was God and made all things before becoming flesh.

  7. John 17:5

    And now, Father, glorify Me in Your presence with the glory I had with You before the world existed.

    Jesus refers to glory he had with the Father before the world existed.

  8. Hebrews 10:5

    Therefore, when Christ came into the world, He said: “Sacrifice and offering You did not desire, but a body You prepared for Me.

    'A body you prepared for me' presents his body as something given at his coming into the world.

  9. Luke 1:35

    The angel replied, “The Holy Spirit will come upon you, and the power of the Most High will overshadow you. So the Holy One to be born will be called the Son of God.

    Places the start of his human life at the conception by the Holy Spirit.

  10. Romans 1:3

    regarding His Son, who was a descendant of David according to the flesh,

    He descended from David 'according to the flesh': a real human ancestry, not a body from heaven.

  11. 1 Timothy 2:5

    For there is one God, and there is one mediator between God and men, the man Christ Jesus,

    After the ascension he is still 'the man Christ Jesus'. His humanity continues.

  12. 1 Corinthians 15:47

    The first man was of the dust of the earth, the second man from heaven.

    'The second man from heaven' is the main verse used for heavenly-origin readings, so it matters to the debate.

Common points of confusion
At the incarnation God turned into a man and stopped being God.
John 1:14 says the Word became flesh, but Colossians 2:9 says 'the whole fullness of deity dwells bodily' in him. Philippians 2:7 describes the 'emptying' as taking on a servant's form, not giving up divinity.
'Likeness of men' means Jesus only appeared to be human.
Hebrews 2:14 and 2:17 say he shared the same flesh and blood and was made like his brothers 'in every respect'. 1 John 4:2–3 treats denying that he came in the flesh as a serious error.
Jesus stopped being human when he ascended.
The risen Jesus has flesh and bones (Luke 24:39), 'this same Jesus' will return (Acts 1:11), and Paul still calls him 'the man Christ Jesus' (1 Timothy 2:5).
The Old Testament appearances prove Jesus always had a human body.
Passages such as Genesis 18 and 32 describe a figure appearing as a man, but they never say this figure had a lasting human nature. The New Testament places his becoming flesh at his birth (Galatians 4:4; John 1:14).
1 Corinthians 15:47 says Jesus' body was made of heavenly material.
The contrast in 1 Corinthians 15:45–49 is between Adam's earthly, perishable kind of life and the risen Christ's life-giving, heavenly kind. The verse does not say what his body was made of at his birth, and Romans 1:3 ties his flesh to David's descendants.

Sources: Greek New Testament (Nestle-Aland 28 / SBL Greek New Testament) · Hebrew Bible (Biblia Hebraica Stuttgartensia, Leningrad Codex) · Strong's Exhaustive Concordance · Bauer-Danker Greek-English Lexicon (BDAG) · Brown-Driver-Briggs Hebrew Lexicon · Athanasius, On the Incarnation · Definition of Chalcedon (AD 451) · Menno Simons, The Incarnation of Our Lord (for the heavenly-flesh view) · Racovian Catechism (1605) (for the Socinian view)

Discussion

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