THESE Lectures were originally given in Boston in the Fall of 1930 under the auspices of the Lowell Institution. They were then amplified and, as Gifford Lectures, were delivered before the University of St. Andrews during the academic year 1931–2. In both cases I could reckon on dealing with a cultivated audience, though one not entirely composed of experts; and so felt justified in trying to steer a middle course between the technical and the popular. Thus, on the one hand, I have passed somewhat lightly over the anthropological details, but, on the other hand, have presumed on a general acquaintance with the principles and language of psychology. It remains only to apologize for the fact that my theological knowledge is nil, unless a certain training in philosophy and especially in Greek philosophy can be held to imply an approach in that direction. Finally, I would most sincerely thank both those who appointed me and those who were kind enough to listen to me for an experience which has been for me at once an honour and a pleasure as full as any that have fallen to my lot.
EXETER COLLEGE, OXFORD
Feb. 15, 1932