The orthodox tradition has historically affirmed that Jesus Christ is both fully God and fully human. The persistent question, however, is how far we ought to equate the man Jesus with the divine Logos, the second person of the Trinity who is eternally preexistent. This question of Jesus' relationship to the eternal Word of God is at the heart of the debate over kenoticism, which Bruce L. McCormack treats in a fresh way in his 2006 essay, "Karl Barth's Christology as a Resource for a Reformed Version of Kenoticism" (International Journal of Systematic Theology 8:3 [July 2006], 243-251). This article functions as a prologue to his 2007 Scottish Journal of Theology / T.F. Torrance lectures on kenoticism, titled "The Humility of the Eternal Son: A Reformed Version of Kenotic Christology." (Here is an outline of the lecture cycle; the published volume is reportedly forthcoming from Cambridge University Press, though I still have not seen any announcement.)
Kenoticism is, in a sense, an attempt to answer the question of how the divine and the human exist not simply side-by-side in Jesus, but are hypostatically united with neither confusion nor separation. Paul wrote that Jesus "did not consider equality with God something to be grasped, but made himself nothing (ekenwsen), taking the nature of a servant, being made in human likeness" (Phil. 2:6-7). The central problem is this: How did God become human, taking on mortal flesh with its attributes and limitations, without ceasing to be fully God? Or, to state the question from the other side: How did God become human without his divinity overwhelming and superseding human finitude?
The desire among kenoticists is generally to describe the self-emptying of the second person of the Trinity in a way that affirms Chalcedon. Sixteenth century Lutheranism dealt with this in terms of willed non-use – suggesting that the eternal Son did not lose any divine attributes, but chose to use them in a self-limited way after becoming incarnate. Jesus performed miracles and knew the hearts of men and women when it pleased him to do so. But he did not make use of the divine attributes all the time, and some attributes perhaps not at all (244-5). The fault of this position, McCormack suggests, is that it relies upon a problematic understanding of the communication of attributes which ultimately shifted the "emptying" from the divine side to the human. That the incarnate Logos can do anything, know anything, or be anywhere present, and simply chooses not to, does not take the principle of kenosis seriously enough – nor does it sufficiently explain how the human nature is not overcome by these divine attributes.
But "kenoticism" is more often associated with the version that emerged in nineteenth century German theology, represented by Gottfried Thomasius. Here the argument is that the divine Logos divests himself of attributes that are not essential to the divine being. This he must do in order to make the incarnation possible, for human nature is incompatible with the divine – its inherent limitations would be instantly swallowed up by omnipotence, omnipresence, and omniscience. But these "relative" attributes, Thomasius suggested, are not essential to the being of God; rather, they describe what God is in relation to the world. It is the "immanent" attributes of truth, holiness, and love that describe who God is in se. The Logos could surrender the relative divine attributes without ceasing to be what he is (246). While this attempted solution persisted in isolated quarters until the 1940s, it did not take long for critics to expose the flaws of Thomasius' proposal. "If the second person of the Trinity had to divest himself of any attributes in order to become incarnate (only to take those attributes up again later), then what you had was not a genuine incarnation but only a theophany" (246).
As the title of his article suggests, McCormack suggests that the better parts of kenotic Christology may be rescued from the errors of its sixteenth and nineteenth century incarnations. Although Karl Barth rejected kenoticism in its previous forms, his own doctrine of Christ in fact lends support to a Reformed kenoticism which coheres with the classic Two Natures doctrine and the logic of Chalcedon. For Barth (and for McCormack), election is the controlling theological motif, and so even the being of God cannot be properly described apart from the incarnation – God’s free decision to be God-for-us in Jesus Christ. God is, in his very being, actus purus et singularis – pure act in the particular event of Jesus Christ. And so the incarnation of the Logos into a state of humility, while still an event in time, is a part of who the Son is in all eternity.
With Barth's doctrine of election and its impact on divine ontology in view, we begin to see the implications for the question of the self-limitation of the Logos. Kenosis is "by addition," not by subtraction: in becoming human, God does not divest himself of any attributes, but adds the "form of a servant" (248). The divine being is veiled in creaturely flesh, but is in no way altered. Within the triune being of God, God has made room for "an above and a below, a prius and a posterius, a superiority and a subordination" (CD IV/1, 200-1; cited p. 249) – and these are constitutive of who God is. The story of Jesus washing the feet of his disciples illustrates: the master chooses to become a servant not as a negative divestment of his power and glory, but as an expression of the positive virtues of love and humility. His receptive obedience is a sign of his great strength.
At first blush, this revised kenoticism appears to cohere with the sixteenth century Lutheran view – that Jesus retained the divine attributes and simply chose not to use them (see p. 250). And clearly, the Logos' choosing humility and the form of a servant does involve his self-restraint with respect to omnipotence, omniscience, etc. The difference is that McCormack wishes to make this state an eternal one, so that the pre-incarnate Word and the incarnate Christ are maintained as one, unchanging subject. Humility and obedience to the Father have always been characteristics of the Son. And so in "humbling himself" and taking the form of a servant, the Son is not ceasing to be anything that he is but is expressing his eternal humility. This is where Barth and McCormack have put Hegel into play: the being of God and the divine-humanity of the Son are not based on a predetermined metaphysic, but are actualized in gospel history. God's act, not Greek philosophy, informs us of who God is.
Thus we can see why McCormack wishes to describe kenosis in terms of "the humility of the eternal Son." This is a striking rescue of a doctrine which has been in disfavor in theological circles for generations – but it does require certain theological moves. Barth's theology once again challenges us to rethink everything we thought we knew, and allows us to affirm both the biblical teaching and the orthodox tradition. He challenges us to consider the union of the two natures in Christ, and the being of God, in terms of divine action rather than in terms of attributes. For Barth, God is "the One who loves in freedom." As important as the question of Jesus' divine attributes is, it only gets the discussion so far.
Instead, a proper kenotic Christology is one that describes the incarnation of the Word and the glorification of the human Jesus in terms of the freedom and love of God. What is essential to God’s being is not that God is all-powerful, but that God has embraced self-humiliation and acted for our redemption. What is essential is not that God is everywhere present, but that God elected to be present on the cross as the servant – the suffering servant – of God's own creation.
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