In this volume, the third and the last, Paul Tillich sets forth his ideas of the meaning of human life, the doctrine of the spirit and the church, the trinitarian symbols, the relation of history to the Kingdom of God, and the eschatalogical symbols. He handles this subject matter with powerful conceptual ability and intellectual grace. 'The real intent and acomplishment of Dr. Tillich is to show that the full truth of human existence can only be grasped through a meeting and a uniting of personal faith and rational understanding.' Daniel D. Williams, Review of Religion.