This book owes its origin to the fact that in the autumn of 1921 the authorities of Manchester College, Oxford invited me to deliver the inaugural course of a lectureship in religion newly established under the will of the late Professor Upton. No conditions being attached to this appointment, it seemed a suitable opportunity to discuss, so far as possible in the language of the moment, some of the implicits which I believe to underlie human effort and achievement in the domain of the spiritual life. The material gathered for this purpose has now been added to, revised, and to some extent re-written, in order to make it appropriate to the purposes of the reader rather than the hearer. As the object of the book is strictly practical, a special attempt has been made to bring the classic experiences of the spiritual life into line with the conclusions of modern psychology, and in particular, to suggest some of the directions in which recent psychological research may cast light on the standard problems of the religious consciousness. This subject is still in its infancy; but it is destined, I am sure, in the near future to exercise a transforming influence on the study of spiritual experience, and may even prove to be the starting point of a new apologetic. Those who are inclined either to fear or to resent the application to this experience of those laws which-as we are now gradually discovering-govern the rest of our psychic life, or who are offended by the resulting demonstrations of continuity between our most homely and most lofty reactions to the universe, might take to themselves the plain words of Thomas à Kempis: "Thou art a man and not God, thou art flesh and no angel."
