Book excerpt: "The chapters included in this volume were delivered in their original form as public lectures in Craig Chapel of Drew University during the academic year 1953-54. They comprise the fifteenth series of lectures to Christian Biography on a foundation established by President and Mrs. Ezra Squier Tipple. The selection of the participants in the lectureship followed easily upon the choice of the subject. The lecturers were assembled under a commission entitles "The Challenge of Christian Existentialism." The major motive in this title is clear. A cultural movement which is exercising so great an influence upon the reformulation of Christian thought deserves to be appraised."--Preface