Frontmatter -- Table of Contents -- Acknowledgments -- Foreword / Gilkey, Langdon -- A. The Divine-Human Interplay of Revelation Expressed in Paradox and Breakthrough -- ¿. The Rise and Fall of the Concept of Breakthrough in 39 Writings of Tillich's Theological Development 1919-1964 -- C. The History of "Breakthrough" and "Paradox" in Summary and Review -- List of Abbreviations -- Bibliography / Tillich, Paul -- Appendix: Paul Tillich: Systematische Theologie of 1913