AS it seems to be the intention of the founder of the Terry Lectures to enable representatives of science, as well as of philosophy and of other spheres of human knowledge, to contribute to the discussion of the eternal problem of religion, and since Yale University has bestowed upon me the great honor of delivering the Terry Lectures of 1937, I assume that it will be my task to show what psychology, or rather that special branch of medical psychology which I represent, has to do with or to say about religion.