in the present work was investigated during my graduate studies at
Harvard, where my close associations with Professors Wild and Tillich
provided both the inspiration and direction for a disciplined study of
existentialism. Other scholars who have taught me and who have con-
tributed both directly and indirectly to the realization of the following
undertaking are Professor Julian Hartt of Yale University and Professor
Karl Löwith of Heidelberg University. Not to be overlooked are the
helpful suggestions and criticisms which I have received from my stu-
dents, both at Purdue University and the University of Illinois. The
Revue Internationale de Philosophie has kindly given me permission
for the use of parts of my article, "Phenomenology, Ontology, and
History in the Philosophy of Heidegger", published in 1958 (No. 44,
fase. 2); and The Personalist has permitted me to incorporate in chap-
ter v part of my article, "Kierkegaard's Existential Reflections on
Time", published in 1961 (Vol. XLII, No. 2). I am also most grateful
to the Purdue Research Foundation for a generous grant which made
it possible for me to engage in a summer of uninterrupted study and
research, at which time the present study reached its final form, and
for a further grant in aid of publication. Finally, I wish to express my ap-
preciation to Mrs. Ruth Bessmer for her technical help with the prepara-
tion of the manuscript and to Miss Judith Kay Dyer for her competent
assistance in correcting the proofs.

CALVIN O. SCHRAG

Purdue University, 1961

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