Hans Urs von Balthasar, in his devotional work The Threefold Garland, details Mary’s consent and conception of Christ. Mary said a magnificent “Yes” to the voice of the angel (“I am the servant of the Lord”), and so conceived the Messiah in her own womb. Her obedience was miraculous, surely aided by the Spirit. And yet, as Balthasar says, while Mary was obedient to the calling of God, the calling was a mystery. It was shrouded with darkness: who was this son going to be? How will he be the savior of her people?
It may be that Mary felt a slight anxiety at what might be awaiting her… She knows she has been expropriated into God’s whole objective history of salvation, and that at the same time she has been placed on a pedestal, since the center of this salvation history is here living and growing within her own center, eventually to emerge from her. But this does not arouse any panic in her, for by her own consent she has surrendered to the… mystery… (p 36-37)
Mary has surrendered to the mystery of God’s plan of redemption. She knows he has come to save her people Israel, and that she is even an integral part of that. And yet, this is all she knows. She is therefore surrendering herself, giving herself up, “crucifying” her own questions and doubts in order to offer herself as a fitting agent of God’s salvation. As Balthasar says quite eloquently, she allows herself to be “borne along by what [she] contains” (p 37). As much as the Son was carried in her womb, she herself was carried along by the Son in his mission to save. In this way, Mary is already a disciple of the Lord, following him along the way to crucifixion. She is offering herself to be used by the God of Israel.
But, Balthasar continues by explaining that as much as Mary surrendered to a mysterious path, one which entailed her self-offering, Christ’s did as well. And why? Precisely because as much as Mary was carried by her Son and his mission, so He was carried by her! And this being carried entailed a voluntary “yes” to the will of the Father. A voluntary kenosis of the only Son of the Father into the helpless abode of Mary’s womb.
But precisely this attitude of the Mother is nothing other than her integration into the attitude of her Child. Every child must begin by letting itself be borne. And this Child in particular, even when it is big, will never outgrow its childhood: even when he acts as an adult he will always let himself be borne and impelled by the will of the Father as manifested to him by the Spirit. Now he is undergoing his first, physical training as he is carried about bodily. It is training as in a novitiate, when a person is ordered around like a child. This is the first training in what every Christian must always be able to do: let himself willingly “be led where you do not want to go”, as Jesus will say to Peter (p 37-38)
This is a miraculous passage by Balthasar: as much as Mary must surrender and be led by the Father (and the Son), so now the divine Son must surrender, and even before birth, self-offer himself to be brought along and carried about by his Mother.
The child in the womb does not know where it is being borne. Nor will Jesus know where he is being “driven” by the Holy Spirit (Mk 1:12): it may, for instance, be into the wilderness and temptation… Now this child, later on as a man… the Son will let himself be borne about as a thing that one can dispose of — and this is he who bears the sin of the world, and therefore, the world itself.
Only one — the Father in heaven — sees all of this, sees where the triune decision to save has led. In Mary, the Son is already under way; already he begins to be driven about in the world, and no one, not even the Father, can call him back. (p 38-39)
Already in the womb, the Son is being given by the Father. He is being handed over to be handled and controlled by human hands. And in this way, even the womb is a cross: it is a place in which the Son willingly offers himself. As much as Mary surrenders to the will of the Father, the Son surrenders infinitely more to that same will, and allows himself to be borne about. This is the loving kenosis of the Son of the Father!