'Of the many attempts to interpret Christianity solely in ethical terms, Kant's effort seems to me to be the most profound and illuminating. His Religion Within the Limits of Reason Alone illuminates primarily the great philosopher's understanding of man's moral life, but also casts light, indirectly and directly, on some of the fundamental beliefs of Christian religion. The book is indispensable to students of ethics, important for theologians, and significant for all who are concerned about the human condition.'