Book excerpt: The image of God as light abounds in Scripture and the Christian tradition. In The Radiance of God, Douglas M. Koskela explores the theme of divine radiance across the span of Christian doctrine. The book develops a constructive account of the Christian gospel that traces the journey from darkness into the marvelous light of God. Drawing on an ecumenical range of voices in the tradition, Koskela frames the discussion in terms of three central concepts: allure, movement, and joy. The image of divine radiance suggests the sheer beauty of God that captivates the attention of God's creatures in wonder, love, and praise. The brilliance of this light initiates a process of movement toward it as the Holy Spirit transforms us in the image of Christ, the light of the world. The culmination of this journey is inexpressible and unending joy as we are immersed in the divine light. By following this threefold pattern through the classic loci of Christian doctrine, this volume offers a sustained and coherent treatment of the economy of salvation from creation to consummation.