In the third chapter we utilize the insight thus gained and discuss the line of evolution which enables man to maintain and intensify his true normality. What type of man is he to whom the epithet of _normal_,--an epithet often obscure and misleading,--may be most fitly applied? I claim that that man shall be regarded as normal who has the fullest grasp of faculties which inhere in the whole race. Among these faculties I count subliminal as well as supraliminal powers;--the mental processes which take place below the conscious threshold as well as those which take place above it; and I attempt to show that those who reap most advantage from this submerged mentation are men of _genius_. The fourth chapter deals with the alternating phase through which man's personality is constructed habitually to pass. I speak of _sleep_; which I regard as a phase of personality, adapted to maintain our existence in the spiritual environment, and to draw from thence the vitality of our physical organisms. In this chapter I also discuss certain supernormal phenomena which sometimes occur in the state of sleep. The fifth chapter treats of _hypnotism_, considered as an _empirical development of sleep_. It will be seen that hypnotic suggestion intensifies the physical recuperation of sleep, and aids the emergence of those supernormal phenomena which ordinary sleep and spontaneous somnambulism sometimes exhibit. From hypnotism we pass on in the sixth chapter to experiments, less familiar to the public than those classed as hypnotic, but which give a still further insight into our subliminal faculty. With these experiments are intermingled many spontaneous phenomena; and the chapter will take up and continue the spontaneous phenomena of Chapters III. and IV. as well as the experiments of Chapter V. Its theme will be the messages which the subliminal self sends up to the supraliminal in the form of sensory hallucinations:--the visions fashioned internally, but manifested not to the inward eye alone; the voices which repeat as though in audible tones the utterance of the self within. These _sensory automatisms_, as I have termed them, are very often _telepathic_--involve, that is to say, the transmission of ideas and sensations from one mind to another without the agency of the recognised organs of sense. Nor would it seem that such transmission need necessarily cease with the bodily death of the transmitting agent. In the seventh chapter evidence is brought forward to show that those who communicated with us telepathically in this world may communicate with us telepathically from the other. Thus _phantasms of the dead_ receive a new meaning from observations of the phenomena occurring between living men. But besides the hallucinatory hearing or picture-seeing which we have classed as sensory automatisms, there is another method by which the subliminal may communicate with the supraliminal self.