A number of scattered sentences and paragraphs of this book have previously appeared, in a different context, in my essay, Religious Faith and the Task of the Historian," in Liberal Learning and Religion, a symposium edited by Amos N. Wilder. I am grateful to Harper and Brothers for permission to use them here. An occasional sentence is also used in "The Christian Gospel and History", in the symposium, Christian Faith and Social Action, edited by John A. Hutchison . Scribners have graciously allowed their repetition.
My thanks also go to the several publishers who have permitted quotation from their publications at many places in this volume. These citations are footnoted where they appear.
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A number of abbreviations of titles of books are used in the footnotes to Chapters III and VIII. These may be identified in the appropriate chapter references of the Guide to Literature at the end of the volume.