The doctrine of deification came under challenge during the Reformation. Likewise, Orthodox Christians have sometimes charged that Roman Catholic teachings on deification lack coherence. In light of these divisions, Daniel Keating eloquently explores biblical and patristic testimony to deification and provides a sure guide into its mysteries. Human beings come to share in the Trinitarian life, without blurring the distinction between Creator and creature. Along the way Keating treats us to choice quotations from Thomas Aquinas, Gregory Palamas, Calvin, Wesley, Newman, von Balthasar, and others who attest to the shared inheritance of this fundamental truth of faith.