This was, to begin with, as far as the modern scientific approach is concerned, first made clearly apparent in Hypnotism. Hypnotism seems to be such a modification of normal mental conditions under the power of commanding suggestion as really for the time being to focus consciousness and mental action generally in one suggested line. A new set of inhibitions and permissions are thus imposed upon normal consciousness. Attention is withdrawn from the usual frontiers (if one may use the word) to which, consciously or subconsciously, it has always been directed and centered upon one single thing.[13] [Footnote 13: Sidis defines Hypnosis as the disassociation of the superior and inferior nerve centers. They commonly work in perfect harmony, their blended unity forming one conscious personality. "In hypnosis the two systems or nervous centers are disassociated, the superior centers and the upper consciousness are inhibited or better cut off, split off from the rest of the nervous system with its organic consciousness, which is thus laid bare, open to the influence of external stimuli or suggestions.... In hypnotic trance ... we have direct access to man's organic consciousness and through it to organic life itself."... If we broaden this last sentence to include not only organic consciousness but the deeper strata of personality in which not only individual but perhaps racial experience is bedded, we have the key to a vast range of obscure phenomena. Sidis believes that "strong permanent impressions or suggestions made on the reflex organic consciousness of the inferior centers may modify their functional disposition, induce trophic changes, and even change organic structure" and this in a sentence is probably what lies behind all faith and mental healing.--"The Psychology of Suggestion," pp. 69 and 70.] The hypnotized person becomes, therefore, unconscious of any reporting agencies outside the field of his abnormally focused attention. Normal conditions of pain or pleasure cease for the time to become real. Attention has been forced entirely out of normal channels and given a new direction. Then we discover, strangely enough, that though those messages of the afferent nerves cease to have any effect upon the subject, the imaginings of the subject carried back along outgoing lines produce the most unexpected results in physical states. If a postage stamp be placed upon the hand of the hypnotized subject and he be told that the stamp is a mustard plaster, the stamp reddens the skin and presently raises a blister. In other words, heightened and intensified expectant attention is able to produce the same results as an irritating agency.[14] [Footnote 14: Experiments by Krafft-Ebing and Forel. To be taken with caution. See Jacoby, "Suggestion and Psycho-Therapy," p. 153.] _Changed Attention Affects Physical States_