The Problems of Psychical Research

I believe that practically all the phenomena of spiritualism are true; that is, that they have occurred in a genuine manner from time to time in the past; that they are supernormal in character, and are genuine phenomenal occurrences. But as to the further question: ''What is the nature of the intelligence lying behind and controlling these phenomena?''--that, I think, is as yet unsolved, and is likely to remain so for some time to come.