The Interior Word: When another personality speaks from the entranced or semi-entranced body, be the latter a spiritualist medium, a hypnotized person, or a psychologically auto-suggested one, we have a phenomenon in which no true mystic would take part. When this same personality announces itself to be Jesus, Krishna, Saint Francis, Mrs. Eddy, or Mme. Blavatsky, it may immediately be labelled as spurious. Whether the phenomenon be produced by actual spirit-possession (when usually a lying spirit is the operating agent) or by psychological self-obsession, with the wakeful personality unconscious of what the other has said, in both cases it is one which ought to be avoided. The Catholic Church, with its very wide experience in such matters, has cautioned its adherents against being seduced either into allowing the thing to happen or into believing the teaching given by the mysterious visitor. Pope Benedict XIV went so far as to ascribe a diabolic origin to the voice. From the standpoint of philosophy it may be said that the Inner Word speaks only to a man, never through him to others. Nor is it heard clairaudiently and therefore psycho-physically; it is heard only mentally and inwardly.
-- Notebooks Category 22: Inspiration and the Overself > Chapter 2 : Inspiration > # 132