Surprisingly, with Myers, the idea concerning personality and ability dovetails with the homonucleus - in his case, a belief wrought by experimentation, usual with hysterics or the hypnotized, that within us lie parallel selves, selves often like the Overmind, that know much more than the quotidian personality. For Myers, it seems that other lives within ourselves are experiencing their own timelines and experiences unbeknownst to the daily personality - which comes to the for during said crises, hypnosis, or other events or emotional instabilities that enable another self to come forth. Myers connects this to genius as well - how works of art, science and so forth seem to come full blown to the recipient.
What this means to the overall view of our greater intellectual environment I cannot say yet - I have to read more. But what I can say is that I have encountered this in my own writing. Sometimes - many times - it seems that I am only the stenographer - that another identity has already figured out the book and it is for me to put it down as best I can with a portion of my own abilities. Others have said that this is only the workings of the unconscious, but in a way, this is meaningless - only a word to cover an unknown process. I believe we all experience this "outside" force in one way or another all the time. It may look like an odd coincidence or luck in our lives, but I think if we examine our own dreams we can get an inkling: most are just noise, but a few solve problems or enlighten us in certain aspects of our lives (not to mention, give us extra sensory knowledge of some distant or future event.) What intelligence is this that seems to work apart from our own will, for it surely has its own will? Is this a parallel self working within us? Myers had many examples of deft automatic writing, where the person writing might also be reading a book while his hand is writing another, in another voice about another subject. Certainly something to think about - and I am not very sure I am comfortable with it. Caramba, I'm not also so comfortable with one self.
But the really, the evidence is everywhere. In Julian Jayne's "Bicameral Mind, " he posits the view that the prophets were dealing with aspects of their right brain, where information is arranged in broad symbolic strokes. He believes more primitive people had less of a separation between the verbal and rational left side and the emotional, symbol-laden right - and thought that visions of God were real. The information that they got from this "god" came from a more generalized piecing together of a vast array of information which would be too large to process for the rational mind.
And yet: the (hidden) personalities encountered by Myers were often full-blown and rational. Different streams of consciousness, many available to the single brain? And beyond - do these streams continue to flow, still integrated, beyond the brain? More to come, FK