My life is very exciting. Take last night, for instance. It was a Saturday night, a time when most people are going out to dinner, taking in a movie, or visiting a nightclub. Me? I was thinking about split-brain patients.
You've heard of them -- people who've had their two cerebral hemispheres surgically severed, and who then exhibit clear signs of independent mental function in each hemisphere. Such cases are sometimes used as an argument that consciousness is produced by the brain, as opposed to the dualistic idea that consciousness operates through the brain. The argument, as I understand it, is that if consciousness did originate outside the brain, it could not be split in two by the splitting of the brain; it would remain unitary regardless of the brain's condition.
As you might expect, I'm unimpressed by this line of reasoning. It seems to me that the split-brain experiments show this much, and nothing more -- that consciousness as it is experienced while we are embodied on earth is dependent on the brain, and can be affected in various ways by changes to the brain.
I'm not sure why this is thought to be a point worth making, as I doubt that very many people have ever questioned it. Anyone who has consumed alcohol or observed the effects of Alzheimer's -- to give just two examples -- knows that changes in brain chemistry or brain structure will affect the way consciousness is experienced.
The particular significance of the split-brain data is held to be that two loci of consciousness are produced -- a left hemisphere locus and a right hemisphere locus. The right hemisphere locus seems to be fairly limited in its capabilities; nevertheless, there is some consciousness operating in (or through) that part of the brain, which is distinct from the consciousness operating in (or through) the left hemisphere. Thus the nonverbal right hemisphere will be aware of things that the verbalizing left hemisphere doesn't perceive.
This phenomenon is certainly interesting, but I fail to see why or how it says anything about whether consciousness is produced by the brain, or merely operates through it. If we assume, for argument's sake, that some form of dualism is true and that consciousness uses the brain as an instrument, then cutting the instrument into two separate pieces is clearly going to affect the way consciousness uses it. As a rough analogy, consider a situation where a gust of wind blows through a pipe, producing a musical sound. If the pipe is cut in two pieces, then the gust of wind will blow through both pieces and produce two sounds. But there is still only one gust of wind.
In order to address this kind of argument in greater detail, we first have to consider the more fundamental question: what is consciousness? Clearly, consciousness cannot be simply what we are aware of at any given moment. Such a narrow definition would leave out the subconscious mind and, for that matter, the nonverbalized right-hemispheric awareness of split-brain patients.
I think the best understanding of consciousness is the one suggested by F.W H. Myers' term "the subliminal self." By subliminal, Myers meant below (or above) the limits of ordinary awareness. Myers' conception was that consciousness was a multilevel affair, comparable to a house with a cellar (the subconscious) and a sunlit attic (what we might call the superconscious).
Or, to change the image, we might think of consciousness as a segment of a frequency spectrum. A narrow band of frequencies in the middle of the spectrum corresponds to our ordinary consciousness, while the much wider bands on either side correspond to our subconscious and superconscious -- our "lower self" and "higher self." How far these may extend in either direction is unknown, but possibly they extend a good deal further than we imagine.
Proponents of dualism sometimes regard the brain as a receiver or a filter. Continuing the spectrum analogy, we might say that the brain can strongly and clearly pick up only the frequencies in the midrange, and can pick up, at best, only weak, ghostly impressions from the higher and lower ranges, roughly similar to the occasional bleed-through from one radio station to another one that is adjacent on the dial.
Now, if there is any truth in this picture (which is purely illustrative and not intended as a formal theory), then what would happen if consciousness were to find itself operating "outside of" the body -- i.e., freed from the brain? I think we would expect to have sudden access to the whole spectrum, including the ends that had previously been cut off by the limitations of the brain as a receiver (or filter). We would still be conscious of "ourselves," because the familiar midrange of the spectrum would not have been lost; but we would abruptly be aware that we are much more than we had realized.
We would have immediate access to the total spectrum of our consciousness, including the "high end" of the spectrum, and from this higher perspective we might see a logic, a pattern, a wholeness, a meaning and significance to everything that had previously seemed random, accidental, and unimportant. This perspective, once glimpsed, could never be completely forgotten -- but if we then returned to our normal brain-based mode of consciousness, with all its narrowness and limitations, we would be hard-pressed to prove our insights or even to put them into words. They would be "ineffable."
Varying the analogy slightly, suppose that a person with normal human vision were briefly gifted with the ability to see beyond the edges of the visible light spectrum. A whole new world would open up for this person, a world of infrared and ultraviolet wavelengths, of X-rays and microwaves, of radio waves and gamma rays. If he were then to return to using only his normal vision, could he adequately describe in words the colors and sights he'd seen? I don't see how he could. The experience could not be translated into the terms familiar to the rest of us, who are restricted to normal vision. Yet in fact what we call normal vision perceives only a thin slice of the electromagnetic spectrum, and the other frequencies in the spectrum are no less real than the visible light frequencies.
So this is the kind of experience we would logically expect if something like the spectrum idea is true of consciousness. And in many cases, isn't this exactly what we do observe? The literature of transcendent mystical experiences, deathbed visions, and near-death experiences all seems to agree that a person freed from the limitations of ordinary consciousness does experience precisely this feeling of expanded awareness, holistic perception, and union with a higher self.
It seems to me that changes in consciousness brought about by changes in the brain -- whether temporary changes like intoxication or permanent changes like split-brain surgery -- pose a problem for dualism only if we assume that our ordinary embodied consciousness is the only consciousness there could possibly be. On the other hand, if we see our ordinary consciousness as a narrowly filtered slice of the larger spectrum of consciousness, the greater part of which we cannot access during our embodied life except under special circumstances, then the problem simply disappears. (In the postscript below, I look at a related objection, first addressed by William James.)
Is there any way of testing this idea or trying to disprove it? Showing that brain illness, brain damage, and pharmacological alteration of the brain can affect or even split consciousness will not disprove it. What would disprove it, I suppose, is if no "higher" or "expanded" consciousness was reported in conditions where a dualist would expect to find it. For instance, if people undergoing NDEs, whose brains have temporarily stopped functioning or are barely functioning, did not report a state of consciousness different from their ordinary state, then this would be good evidence that the brain does not act as any sort of filter or receiver, or at least that there are no higher or lower frequencies of consciousness that are being cut off by the brain's reception.
But of course, people undergoing NDEs frequently do report a higher, expanded state of consciousness in various respects. For instance, they may report supernormal perception, as in this NDE of a drowning victim:
Suddenly I could see and hear as never before. The sound of a waterfall was so crisp and clear that it just cannot be explained by words. Earlier that year, my right ear had been injured.... But now I could hear perfectly clearly, better than I ever had before. My sight was even more beautiful. Sights that were close in distance were as clear as those far away, and this was at the same moment, which astounded me. There was no blurriness in my vision whatsoever. I felt as if I had been limited by my physical senses all these years, and that I had been looking at a distorted picture of reality. [quoted in Lessons from the Light, by Kenneth Ring, p. 35]
Or they may report supernormal knowledge, wisdom, and understanding, as in Carl Jung's NDE:
I had the certainty that I was about to enter an illuminated room and would meet there all those people to whom I belong in reality. There I would at last understand - this too was a certainty - what historical nexus I or my life fitted into. I would know what had been before me, why I had come into being, and where my life was flowing.... My life seemed to have been snipped out of a long chain of events, and many questions had remained unanswered. Why had it taken this course? Why had I brought these particular assumptions with me? What had I made of them? What will follow? I felt sure that I would receive an answer to all the questions ..."
Are there other test cases we find, besides NDEs? How about Induced After-Death Communications -- subjective encounters with the deceased that can be brought about by EMDR therapy? I've discussed these elsewhere. For our present purposes it's enough to point out that the deceased figures encountered in these IADCs invariably communicate understanding, forgiveness, and acceptance, and give the impression that they can see life from a higher perspective. They are still recognizably themselves, but they seem to also be more than themselves -- an enhanced, ennobled, elevated version of themselves. Again, this is just what we would expect if there is a wide spectrum of consciousness, much of which is unavailable to us during our embodied existence, but which becomes available after the brain no longer cuts out the high and low ends of the spectrum.
How about mediumistic communications? According to many such messages, the difficulties of "coming through" are considerable; the communicator must "lower his vibrations" and enter a trancelike state in order to speak through the medium. In other words, to use the medium's brain as an instrument, the communicator must reduce his own range of consciousness. Isn't this strikingly consistent with the spectrum idea? Doesn't it help explain lapses in the quality of mediumistic communications, and the frequently expressed frustration of the communicators themselves?
I also can't help thinking of the persistence, across time and cultures, of the idea of guardian angels. Suppose for a moment that the spectrum idea is true, and that the brain ordinarily receives only the midrange of the spectrum, cutting out the highs and lows; but that in certain states of mind, such as meditation or a hypnagogic state, some part of the hidden material can bleed through. Wouldn't the insights -- fragmentary and tantalizing though they might be -- that we glean from these "altered states" of consciousness dovetail neatly with the idea of a guardian angel (or personal deity) with whom we can commune, and from whom we can gain special wisdom? Socrates' daimon, who was said to have guided him throughout his life, could be part of the higher range of the spectrum of his consciousness, intuitively accessible through reverie or meditation.
I don't think anyone would deny that there are at least two levels of consciousness -- the everyday conscious mind, and the subconscious. Myers' "subliminal self" makes room for a third level, a higher self, which is just as mysterious to our ordinary consciousness as the subconscious is, but no less real. And I see no reason why this total range of consciousness, though it no doubt can be influenced by our experiences and conditions while embodied, must be in any way dependent on our embodiment.
In short, I see no problem for dualism in the undeniable fact that our ordinary waking consciousness can be impaired, distorted, or chopped up as a direct result of injuries and insults to the brain which consciousness uses. There is just no reason to think that our ordinary, everyday consciousness is the totality of our consciousness. On the contrary, I think it is likely to be a rather thin slice of a wide spectrum ranging from the subconscious to the superconscious, from the lower self to the higher self. A temporary alteration of brain activity, perhaps during meditation or at the advent of sleep, may put us in touch with a larger portion of this total spectrum, and death (if it entails separation of consciousness from the body) would naturally open up even more of the spectrum of consciousness to our immediate awareness. We would still be ourselves, but we would also be more than what we presently know ourselves to be.
This idea, of course, cannot be proved, but it is consistent with a great deal of mystical teaching, folkloric tradition, and parapsychological research. I think it is more likely to be true than any purely materialistic account, which cannot explain mystical transcendence, paranormal phenomena, or for that matter, consciousness itself.
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P.S. One anti-survivalist argument is that if consciousness is radically divided in two by split-brain surgery, then our personality as such must similarly be the result of the brain's structure, and so upon death (even in a dualistic framework) the individual personality would be extinguished, and all that would be left is some egoless universal consciousness. William James, in his famous essay "Human Immortality," which lays out the transmission theory of consciousness, anticipates this objection and addresses it in endnote 5:
The transmission-theory connects itself very naturally with that whole tendency of thought known as transcendentalism.... But it is not necessary to identify the consciousness postulated in the lecture, as pre-existing behind the scenes, with the Absolute Mind of transcendent Idealism, although, indeed, the notion of it might lead in that direction. The absolute Mind of transcendental Idealism is one integral Unit, one single World-mind. For the purposes of my lecture, however, there might be many minds behind the scenes as well as one. All that the transmission-theory absolutely requires is that they should transcend our minds, -- which thus come from something mental that pre-exists, and is larger than themselves. [endnote 5]
In his preface to the second edition, James elaborates on his point:
So many critics have made one and the same objection to the doorway to immortality which my lecture claims to be left open by the "transmission-theory" of cerebral action, that I feel tempted, as the book is again going to press, to add a word of explanation.
If our finite personality here below, the objectors say, be due to the transmission through the brain of portions of a pre-existing larger consciousness, all that can remain after the brain expires is the larger consciousness itself as such, with which we should thenceforth be perforce reconfounded, the only means of our existence in finite personal form having ceased.
But this, the critics continue, is the pantheistic idea of immortality, survival, namely, in the soul of the world; not the Christian idea of immortality, which means survival in strictly personal form.
In showing the possibility of a mental life after the brain's death, they conclude, the lecture has at the same time shown the impossibility of its identity with the personal life, which is the brain's function....
The plain truth is that one may conceive of the mental world behind the veil in as individualistic a form as one pleases, without any detriment to the general scheme by which the brain is represented as a transmissive organ.
If the extreme individualistic view were taken, one's finite mundane consciousness would be an extract from one's larger, truer personality, the latter having even now some sort of reality behind the scenes. And in transmitting it -- to keep to our extremely mechanical metaphor, which confessedly throws no light on the actual modus operandi -- one's brain would also leave effects upon the part remaining behind the veil; for when a thing is torn, both fragments feel the operation.
And just as (to use a very coarse figure) the stubs remain in a check-book whenever a check is used, to register the transaction, so these impressions on the transcendent self might constitute so many vouchers of the finite experiences of which the brain had been the mediator; and ultimately they might form that collection within the larger self of memories of our earthly passage, which is all that, since Locke's day, the continuance of our personal identity beyond the grave has by psychology been recognized to mean.
It is true that all this would seem to have affinities rather with preexistence and with possible re-incarnations than with the Christian notion of immortality. But my concern in the lecture was not to discuss immortality in general. It was confined to showing it to be not incompatible with the brain-function theory of our present mundane consciousness. I hold that it is so compatible, and compatible moreover in fully individualized form. [Preface to Second Edition; emphases in original]
I think it is fair to say that a purely logical terms, there can be no objection to the possibility that the personality does dissolve upon death, leaving only an egoless "world mind." However, in considering the problem, we are obliged to use not only logic but also empirical data. And it seems to me that the empirical evidence makes this idea highly unlikely, inasmuch as people who have reported transcendent mystical experiences, near-death experiences, etc., generally do not speak of losing the sense of self altogether. Rather, they speak of an expanded sense of self.
Even mystics who report that they were "united with all existence" seem to retain some sense of personal identity, though its importance may be vastly diminished; they say, "I was one with the universe," which implies that there was still an "I."
On the basis of reports from people who've undergone these altered states of consciousness (and on the basis of ADCs, IADCs, mediumship, past-life memories, etc.), I would say that the individual personality probably does survive death, but in an expanded form. Though the alternative possibility of merging selflessly into a universal mind is logically possible, it does not seem to fit the facts, or what I take to be the facts. (This is not to say that at some later stage of postmortem existence, the personality might not eventually lose itself in the vast ocean of a universal mind. Who knows? But in the earlier stages, this does not seem to happen, if the available evidence can be trusted.)
Incidentally, note that James's formulation above fits the spectrum idea very nicely:
If the extreme individualistic view were taken, one's finite mundane consciousness would be an extract from one's larger, truer personality, the latter having even now some sort of reality behind the scenes.
This is just the way I look at it, and I think it is precisely this possibility that is overlooked by those on the other side of the question, who seem to assume that consciousness must be limited to our everyday experience of it (our "finite mundane consciousness," as James put it).
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P.P.S. Here are a few additional examples of the enhanced clarity of thought often reported in NDEs.
In Irreducible Mind, by Kelly and Kelly et al, we read:
A recent analysis of our collection [of NDE cases] showed that 80% of near-death experiencers described their thinking during the NDE as "clearer than usual" (45%) or "as clear as usual" (35%). Additionally, 74% described their thinking as "faster than usual" (37%) or at "the usual speed" (37%); 65% described their thinking as "more logical than usual" (29%) or "as logical as usual" (36%); and 55% described their control over their thoughts as "more control than usual" (19%) or "as much control as usual" (36%). [p. 386, footnote 16]
The authors add:
Furthermore, an analysis of cases in our collection in which we were able to examine contemporaneous medical records showed that, in fact, people reported enhanced mental functioning significantly more often when they were actually physiologically close to death then when they were not. [p. 386, main text, emphasis in original]
The fact that proximity to physical death correlates positively with enhanced, as opposed to merely normal, mentation would count as evidence that the brain does act as a filter of sorts, and that as its filtering activity lessens, consciousness expands.
Irreducible Mind also quotes the famed NDEr Pam Reynolds as saying that during her NDE she was "the most aware that I think I have ever been in my life," and that her vision was "not like normal vision. It was brighter and more focused and clearer than normal vision," while her hearing "was a clearer hearing than with my ears." (p. 393, citing Sabom, Light and Death.)
Two other quotes from Irreducible Mind are worth noting. One is a statement by a cardiac arrest patient, who said, "I do not have words to express how vivid the experience was. The main thing that stands out is the clarity of my thoughts during the episode." Another is a statement made by a six-year-old who also suffered cardiac arrest (presumably during surgery), and remarked that "it was realer than real." [pp. 417-418]
"Realer than real" is how we might expect our experience to feel if we abruptly obtained access to a wider range of consciousness and perception.
Also, I looked at Robert Crookall's book More Astral Projections, which compiles numerous accounts of OBEs and NDEs (although the term NDE had not been coined when Crookall's book was published in 1964). Comparing the statements of OBErs and NDErs with those communicated through mediums, Crookall writes:
Both astral projectors and the 'dead' state that the physical body acts on the Soul Body, and therefore on the Soul and on consciousness, after the manner of the "blinkers" on the harness of a horse, or like a damper, a blanket, a sphincter, etc.: it narrows, focuses and retards our thought and emotions. This statement accords with another (made independently) that when the physical body is shed, either temporarily, as in astral projection, or permanently, at death, thought and feeling is much more rapid and more intense.... [Case] No. 20 similarly said, "You may think that you can think and act with rapidity -- but once you have become conscious in the astral body you will realize at what a snail's pace the conscious mind moves in comparison." ...
The "communicator" of E.C. Randall (The Dead Have Never Died ... 1918, p. 122) said that all the mental actions of mortals are "intensified to a degree you cannot imagine" once the blinkers-like body is cast off . [Three similar examples are given, followed by:] "Julia" told W.T. Stead [After Death ... 1897, p. 33] "Material senses are not so much to help us to see and hear as to bar us off from seeing and hearing. We are on earth, as it were, with blinkers on.... Death is more of a laying-down of the blinkers that limited and confined our vision than almost anything else." [pp. 122-123]
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