Abstract
These posthumously published lectures are designed to sponsor a new root metaphor for reflection on Christian ethics. The familiar models of teleological ethics and deontological ethics are not abandoned, but a new one is added to meet their inadequacies. It is man-the-answerer, homo dialogicus, and in terms of the symbol the notion of a responsible self is delineated. That the new model lends itself more readily to phenomenology than to casuistry is wholly within the author's intention. A lengthy, but useful, introduction by James Gustafson places these lectures in the broader context of Niebuhr's thought.--M. W.