The quotation comes from the late Alan E. Lewis’ magnum opus, Between Cross and Resurrection: A Theology of Holy Saturday (Grand Rapids: Eerdmans, 2001):
“Jewish literature, within and outside the Scriptures, had long before John personified as Word or Wisdom that creative, self-communicating power by which God made and ruled the world, saved and addressed the chosen people (e.g. Ps. 33:6; Prov. 3:19; 8:22; Isa. 55:10-11). But no incipient hypostatization of this divine self-disclosure crossed the threshold of God’s own monarchy to become an independent entity, more or other of God’s self-in-action. It was even less conceivable that the wide ground of holiness and power, guarding God’s transcendence from all confusion with the ceatures of the Maker’s hand, should be trampled and defiled through an identification of Yahweh’s eternal act and being with the immanent, mortal clay of human life. Yet for John it was precisely flesh—transient, grasslike, and dependent—that God’s eternal, creative Word became.”
Of course, one cannot follow Lewis everywhere he leads, but this is a fascinating book on a subject not often addressed in academic theological discourse, and it is highly recommended to all as an original and rewarding contribution to the literature.