Claude Welch is Professor, Graduate Theological Union, Berkeley. He edited God and Incarnation (1965), in which he translated Part Three of Dorner's essay. Robert R. Williams is Professor of Philosophical Theology at Hirim College, Hiram, Ohio. Isaak August Dorner (1809-1884) is best known for his histories of Christian doctrine, including his five-volume History of the Development of the Doctrine of the Person of Christ (1846-1856).

