Finally, men like Crookes and Wallace took up the subject and investigated the phenomena, not from the emotional, expectant, or fraternal aspect, but from the purely scientific, and rendered their verdict, which, though frequently ignored or treated with contempt, remains practically unaltered. Thousands became convinced of the _fact_ of life beyond the grave, and at the same time of the unreliability of many so-called "communications." Finally the "Society for Psychical Research" was formed; phenomena were searchingly examined, verified, and recorded as a basis for further research. The posthumous work of F. W. H. Myers, "Human Personality and its Survival of Bodily Death," added to the Society's records and many other publications a record of verified facts in psychic phenomena such as never before existed, and which nothing short of a cataclysm can destroy. In the meantime, the "dark circle" went into desuetude, and Spiritualism, as a cult, declined. Accepting the broad conclusion of a life after death, and with no very clear demonstration as to exactly where, or how, the case rested largely. The reason for this obscurity was to be found in the absence of clear conceptions as to the nature of the human soul, and what life on the spiritual plane really signifies. In other words, the foundation was laid empirically to await classification and conclusions in a comprehensive Philosophy of Psychology, consistent with a science of the soul; and there it remains to-day with the average individual, and the average man of physical or psychical science. Returning now from this brief excursion into the social status, to the problem as related to the mental, moral, and physical health of individuals, and bearing in mind our Modulus of Man, and Theorem of Constructive Psychology, we find the annals of Spiritualism, Mediumship, or subjective control, of exceeding importance. Another plane of life exists. Individuals on either plane communicate with the controlling entity on the supra-physical plane. The Medium is invariably subjective and controlled. He has no choice of controls, and often no knowledge (never reliable knowledge) as to who or what controls him. He is sometimes informed by his "guide" as to the control's identity, and learns, often, that he and his circle have been deceived by ignorant or "lying spirits." The whole process reverses our Modulus and Theorem of Constructive Psychology, the building of character and normal evolution. The most important consideration at this point is its relation to the sanity of individuals. There are thousands of individuals to-day, who, failing in rational volition, or self-control, are controlled by entities on the subjective plane. They are _obsessed_.