The doctrine of the Incarnation, as articulated in traditional Christian theology, posits that Jesus Christ is one divine person subsisting in two natures: divine and human. This foundational belief is pivotal for understanding how Jesus can simultaneously refer to the Father as 'my God,' exhibit subordination, and experience death, while also being fully divine and eternal. Proponents of this view often cite Philippians 2:6-8 as a key scriptural basis, and this is a serious textual argument rather than a mere later inference. Paul says Christ was 'in the form of God' and speaks of 'equality with God'; the difficult Greek term harpagmos in verse 6 is debated, but many scholars understand the passage to portray a preexistent Christ who did not exploit divine status for selfish advantage. The 'emptying' of verse 7 is then explained in the text itself by 'taking the form of a servant' and being 'born in human likeness,' culminating in obedience to death.
The Doctrine of Two Natures
The Chalcedonian Definition, a hallmark of orthodox Christian Christology, affirms that Jesus is 'truly God and truly man,' possessing both a divine nature and a human nature without confusion, change, division, or separation. This duality is meant to account for the seeming paradoxes found in the New Testament narratives. For instance, when Jesus refers to the Father as 'my God' in John 20:17, traditional theologians read this as an expression of his genuine human life and filial relation to the Father, rather than as a denial of his own divinity. At the same time, a fair presentation must note that the same chapter contains Thomas's confession to the risen Jesus, 'My Lord and my God' (John 20:28), one of the strongest New Testament texts for a high Christology. The internal question, therefore, is not whether John 20:17 by itself disproves Jesus' divinity, but whether the two-nature explanation can consistently account for both Jesus' language of dependence on the Father and the Gospel's highest claims about him.
Similarly, Jesus' death on the cross is comprehended through this two-nature framework. In much classical Christian theology, death is described as the separation of soul and body; on Chalcedonian terms, the one person of the Son truly dies according to his human nature, while the divine nature itself remains incorporeal and immortal. This wording matters: orthodox theology does not mean that an abstract 'human nature' acts or dies on its own, but that the divine person undergoes a genuinely human death. John 10:17-18 supports the voluntariness of this death, since Jesus says he has authority to lay down his life and take it up again; the same passage also says this authority is received as a command from the Father, keeping the text connected to the New Testament's broader pattern of obedience and mission.
Philippians 2: The Kenosis
Philippians 2:6-8 is often cited as a profound exposition of the Incarnation. The theological term 'kenosis' comes from the verb ekenosen (ἐκένωσεν) in verse 7, usually translated 'emptied himself.' The passage itself defines this emptying in participial phrases: Christ empties himself by taking the form of a servant, being born in human likeness, and humbling himself in obedience. On the classical interpretation, this does not mean the Son ceased to possess divine attributes; it means he assumed a genuinely human mode of life and did not use divine status as a means of avoiding humility, suffering, and death.
Thus, on the classical reading, the kenosis does not imply a change in the divine nature or an ontological reduction of deity. It is better described as the assumption of the servant-form and the non-exploitative use of divine prerogative within the incarnate mission. Some modern kenotic Christologies go further and speak of a temporary self-limitation or non-use of divine attributes, but these proposals are controversial because they press hard on doctrines such as omniscience, omnipotence, and divine immutability. The traditional claim is that the self-emptying is not a diminishment of divinity but a revelation of divine humility and love.
Responses and Internal Tensions
While the traditional interpretation of these passages offers a coherent framework within Christian theology, there are internal tensions that merit exploration. One such tension arises from the relational dynamics within the Trinity as depicted in the New Testament. For instance, John 14:28 records Jesus saying, 'the Father is greater than I,' a statement that can naturally sound hierarchical rather than equal. Traditional responses are more varied than simply assigning the statement to Jesus' human nature: some read it economically, referring to the Son's incarnate mission and return to the Father; others relate it to the Father's role as source within Trinitarian order, while still denying inequality of essence. The tension remains that the New Testament language of sending, obedience, command, and return must be explained without collapsing into either mere human limitation or an ontological inferiority of the Son.
Another area of tension is the concept of divine immutability. If God is unchanging, how can the Son 'empty himself' or take on new experiences? In classical theology, represented by Thomas Aquinas, the Word does not undergo a change in the divine essence; rather, a created human nature begins to exist and is personally united to the Word. The newness is therefore located on the creaturely side of the relation, not in God considered essentially. This is a precise and important distinction, but it remains philosophically debated because the incarnate Son is now truly described by temporal predicates such as being born, suffering, and dying.
Moreover, the notion of Jesus' voluntary death raises questions about the interplay between divine foreknowledge, divine plan, and human freedom. The New Testament itself holds these together: Jesus prays in Gethsemane in language of real obedience, while texts such as Acts 2:23 speak of his death occurring according to God's definite plan and foreknowledge and also through responsible human agents. Traditional theology often answers through some form of compatibilism, arguing that divine sovereignty and meaningful human agency are not mutually exclusive. Even so, this remains a complex philosophical issue, especially when applied to the will of Christ and the relation between his human obedience and divine mission.
What It Establishes and What It Does Not
The doctrine of the Incarnation, as articulated through the lens of Philippians 2 and related passages, offers a robust theological framework for understanding how Jesus can be both fully divine and fully human. It is also not built on Philippians 2 alone: Christians commonly appeal to texts such as John 1:1-18, John 20:28, Hebrews 1:8, and Titus 2:13 as substantial evidence for a high or divine Christology, while Romans 9:5 is more punctuation-sensitive and disputed but still often treated as important evidence. The two-nature framework aims to account for the full range of New Testament data, including divine titles and functions attributed to Christ, his obedience and prayer to the Father, and his genuine suffering and death.
However, this doctrine does not resolve all theological and philosophical questions. A distinction between person and nature can make the traditional claim coherent, but coherence and exegetical warrant are not identical. The key internal questions are whether the New Testament itself requires this metaphysical framework, whether the same rules are applied consistently to texts of exaltation and texts of subordination, and whether divine immutability can be preserved while speaking of the Son's real birth, suffering, and death. These questions continue to be areas of serious theological inquiry and debate within the broader Christian tradition.