As a neurosurgeon, I did not believe in the phenomenon of near-death experiences. I grew up in a scientific world, the son of a neurosurgeon. I followed my father’s path and became an academic neurosurgeon, teaching at Harvard Medical School and other universities. I understand what happens to the brain when people are near death, and I had always believed there were good scientific explanations for the heavenly out-of-body journeys described by those who narrowly escaped death. 
 
 The brain is an astonishingly sophisticated but extremely delicate mechanism. Reduce the amount of oxygen it receives by the smallest amount and it will react. It was no big surprise that people who had undergone severe trauma would return from their experiences with strange stories. But that didn’t mean they had journeyed anywhere real. 
 
 Although I considered myself a faithful Christian, I was so more in name than in actual belief. I didn’t begrudge those who wanted to believe that Jesus was more than simply a good man who had suffered at the hands of the world. I sympathized deeply with those who wanted to believe that there was a God somewhere out there who loved us unconditionally. In fact, I envied such people the security that those beliefs no doubt provided. But as a scientist, I simply knew better than to believe them myself. 
 
 In the fall of 2008, however, after seven days in a coma during which the human part of my brain, the neocortex, was inactivated, I experienced something so profound that it gave me a scientific reason to believe in consciousness after death. 
 
 I know how pronouncements like mine sound to skeptics, so I will tell my story with the logic and language of the scientist I am. 
 
 Very early one morning four years ago, I awoke with an extremely intense headache. Within hours, my entire cortex—the part of the brain that controls thought and emotion and that in essence makes us human—had shut down. Doctors at Lynchburg General Hospital in Virginia, a hospital where I myself worked as a neurosurgeon, determined that I had somehow contracted a very rare bacterial meningitis that mostly attacks newborns. E. coli bacteria had penetrated my cerebrospinal fluid and were eating my brain. 
 
 When I entered the emergency room that morning, my chances of survival in anything beyond a vegetative state were already low. They soon sank to near nonexistent. For seven days I lay in a deep coma, my body unresponsive, my higher-order brain functions totally offline. 
 
 Alexander discusses his experience on the Science channel's 'Through the Wormhole.' 
 
 Then, on the morning of my seventh day in the hospital, as my doctors weighed whether to discontinue treatment, my eyes popped open. 
 
 ‘You have nothing to fear.’ ‘There is nothing you can do wrong.’ The message flooded me with a vast and crazy sensation of relief. (Photo illustration by Newsweek; Source: Buena Vista Images-Getty Images) 
 
 There is no scientific explanation for the fact that while my body lay in coma, my mind—my conscious, inner self—was alive and well. While the neurons of my cortex were stunned to complete inactivity by the bacteria that had attacked them, my brain-free consciousness journeyed to another, larger dimension of the universe: a dimension I’d never dreamed existed and which the old, pre-coma me would have been more than happy to explain was a simple impossibility. 
 
 But that dimension—in rough outline, the same one described by countless subjects of near-death experiences and other mystical states—is there. It exists, and what I saw and learned there has placed me quite literally in a new world: a world where we are much more than our brains and bodies, and where death is not the end of consciousness but rather a chapter in a vast, and incalculably positive, journey. 
 
 On the iPad Read Newsweek’s 2007 story on how science is bringing more heart-attack victims back to life 
 
 I’m not the first person to have discovered evidence that consciousness exists beyond the body. Brief, wonderful glimpses of this realm are as old as human history. But as far as I know, no one before me has ever traveled to this dimension (a) while their cortex was completely shut down, and (b) while their body was under minute medical observation, as mine was for the full seven days of my coma. 
 
 All the chief arguments against near-death experiences suggest that these experiences are the results of minimal, transient, or partial malfunctioning of the cortex. My near-death experience, however, took place not while my cortex was malfunctioning, but while it was simply off. This is clear from the severity and duration of my meningitis, and from the global cortical involvement documented by CT scans and neurological examinations. According to current medical understanding of the brain and mind, there is absolutely no way that I could have experienced even a dim and limited consciousness during my time in the coma, much less the hyper-vivid and completely coherent odyssey I underwent. 
 
 It took me months to come to terms with what happened to me. Not just the medical impossibility that I had been conscious during my coma, but—more importantly—the things that happened during that time. Toward the beginning of my adventure, I was in a place of clouds. Big, puffy, pink-white ones that showed up sharply against the deep blue-black sky. 
 
 Reliving History: The search for the meaning of the afterlife is as old as humanity itself. Over the years Newsweek has run numerous covers about religion, God, and that search. As Dr. Alexander says, it’s unlikely we’ll know the answer in our lifetimes, but that doesn’t mean we won’t keep asking. 
 
 Higher than the clouds—immeasurably higher—flocks of transparent, shimmering beings arced across the sky, leaving long, streamerlike lines behind them. 
 
 Birds? Angels? These words registered later, when I was writing down my recollections. But neither of these words do justice to the beings themselves, which were quite simply different from anything I have known on this planet. They were more advanced. Higher forms. 
 
 A sound, huge and booming like a glorious chant, came down from above, and I wondered if the winged beings were producing it. Again, thinking about it later, it occurred to me that the joy of these creatures, as they soared along, was such that they had to make this noise—that if the joy didn’t come out of them this way then they would simply not otherwise be able to contain it. The sound was palpable and almost material, like a rain that you can feel on your skin but doesn’t get you wet. 
 
 Seeing and hearing were not separate in this place where I now was. I could hear the visual beauty of the silvery bodies of those scintillating beings above, and I could see the surging, joyful perfection of what they sang. It seemed that you could not look at or listen to anything in this world without becoming a part of it—without joining with it in some mysterious way. Again, from my present perspective, I would suggest that you couldn’t look at anything in that world at all, for the word “at” itself implies a separation that did not exist there. Everything was distinct, yet everything was also a part of everything else, like the rich and intermingled designs on a Persian carpet ... or a butterfly’s wing. 
 
 It gets stranger still. For most of my journey, someone else was with me. A woman. She was young, and I remember what she looked like in complete detail. She had high cheekbones and deep-blue eyes. Golden brown tresses framed her lovely face. When first I saw her, we were riding along together on an intricately patterned surface, which after a moment I recognized as the wing of a butterfly. In fact, millions of butterflies were all around us—vast fluttering waves of them, dipping down into the woods and coming back up around us again. It was a river of life and color, moving through the air. The woman’s outfit was simple, like a peasant’s, but its colors—powder blue, indigo, and pastel orange-peach—had the same overwhelming, super-vivid aliveness that everything else had. She looked at me with a look that, if you saw it for five seconds, would make your whole life up to that point worth living, no matter what had happened in it so far. It was not a romantic look. It was not a look of friendship. It was a look that was somehow beyond all these, beyond all the different compartments of love we have down here on earth. It was something higher, holding all those other kinds of love within itself while at the same time being much bigger than all of them. 
 
 Without using any words, she spoke to me. The message went through me like a wind, and I instantly understood that it was true. I knew so in the same way that I knew that the world around us was real—was not some fantasy, passing and insubstantial. 
 
 The message had three parts, and if I had to translate them into earthly language, I’d say they ran something like this: 
 
 “You are loved and cherished, dearly, forever.” 
 
 “You have nothing to fear.” 
 
 “There is nothing you can do wrong.” 
 
 The message flooded me with a vast and crazy sensation of relief. It was like being handed the rules to a game I’d been playing all my life without ever fully understanding it. 
 
 “We will show you many things here,” the woman said, again, without actually using these words but by driving their conceptual essence directly into me. “But eventually, you will go back.” 
 
 To this, I had only one question. 
 
 Back where? 
 
 The universe as I experienced it in my coma is ... the same one that both Einstein and Jesus were speaking of in their (very) different ways. (Ed Morris / Getty Images) 
 
 A warm wind blew through, like the kind that spring up on the most perfect summer days, tossing the leaves of the trees and flowing past like heavenly water. A divine breeze. It changed everything, shifting the world around me into an even higher octave, a higher vibration. 
 
 Although I still had little language function, at least as we think of it on earth, I began wordlessly putting questions to this wind, and to the divine being that I sensed at work behind or within it. 
 
 Where is this place? 
 
 Who am I? 
 
 Why am I here? 
 
 Each time I silently put one of these questions out, the answer came instantly in an explosion of light, color, love, and beauty that blew through me like a crashing wave. What was important about these blasts was that they didn’t simply silence my questions by overwhelming them. They answered them, but in a way that bypassed language. Thoughts entered me directly. But it wasn’t thought like we experience on earth. It wasn’t vague, immaterial, or abstract. These thoughts were solid and immediate—hotter than fire and wetter than water—and as I received them I was able to instantly and effortlessly understand concepts that would have taken me years to fully grasp in my earthly life. 
 
 I continued moving forward and found myself entering an immense void, completely dark, infinite in size, yet also infinitely comforting. Pitch-black as it was, it was also brimming over with light: a light that seemed to come from a brilliant orb that I now sensed near me. The orb was a kind of “interpreter” between me and this vast presence surrounding me. It was as if I were being born into a larger world, and the universe itself was like a giant cosmic womb, and the orb (which I sensed was somehow connected with, or even identical to, the woman on the butterfly wing) was guiding me through it. 
 
 Later, when I was back, I found a quotation by the 17th-century Christian poet Henry Vaughan that came close to describing this magical place, this vast, inky-black core that was the home of the Divine itself. 
 
 “There is, some say, in God a deep but dazzling darkness ...” 
 
 That was it exactly: an inky darkness that was also full to brimming with light. 
 
 I know full well how extraordinary, how frankly unbelievable, all this sounds. Had someone—even a doctor—told me a story like this in the old days, I would have been quite certain that they were under the spell of some delusion. But what happened to me was, far from being delusional, as real or more real than any event in my life. That includes my wedding day and the birth of my two sons. 
 
 What happened to me demands explanation. 
 
 Modern physics tells us that the universe is a unity—that it is undivided. Though we seem to live in a world of separation and difference, physics tells us that beneath the surface, every object and event in the universe is completely woven up with every other object and event. There is no true separation. 
 
 Before my experience these ideas were abstractions. Today they are realities. Not only is the universe defined by unity, it is also—I now know—defined by love. The universe as I experienced it in my coma is—I have come to see with both shock and joy—the same one that both Einstein and Jesus were speaking of in their (very) different ways. 
 
 I’ve spent decades as a neurosurgeon at some of the most prestigious medical institutions in our country. I know that many of my peers hold—as I myself did—to the theory that the brain, and in particular the cortex, generates consciousness and that we live in a universe devoid of any kind of emotion, much less the unconditional love that I now know God and the universe have toward us. But that belief, that theory, now lies broken at our feet. What happened to me destroyed it, and I intend to spend the rest of my life investigating the true nature of consciousness and making the fact that we are more, much more, than our physical brains as clear as I can, both to my fellow scientists and to people at large. 
 
 I don’t expect this to be an easy task, for the reasons I described above. When the castle of an old scientific theory begins to show fault lines, no one wants to pay attention at first. The old castle simply took too much work to build in the first place, and if it falls, an entirely new one will have to be constructed in its place. 
 
 I learned this firsthand after I was well enough to get back out into the world and talk to others—people, that is, other than my long-suffering wife, Holley, and our two sons—about what had happened to me. The looks of polite disbelief, especially among my medical friends, soon made me realize what a task I would have getting people to understand the enormity of what I had seen and experienced that week while my brain was down. 
 
 One of the few places I didn’t have trouble getting my story across was a place I’d seen fairly little of before my experience: church. The first time I entered a church after my coma, I saw everything with fresh eyes. The colors of the stained-glass windows recalled the luminous beauty of the landscapes I’d seen in the world above. The deep bass notes of the organ reminded me of how thoughts and emotions in that world are like waves that move through you. And, most important, a painting of Jesus breaking bread with his disciples evoked the message that lay at the very heart of my journey: that we are loved and accepted unconditionally by a God even more grand and unfathomably glorious than the one I’d learned of as a child in Sunday school. 
 
 Today many believe that the living spiritual truths of religion have lost their power, and that science, not faith, is the road to truth. Before my experience I strongly suspected that this was the case myself. 
 
 But I now understand that such a view is far too simple. The plain fact is that the materialist picture of the body and brain as the producers, rather than the vehicles, of human consciousness is doomed. In its place a new view of mind and body will emerge, and in fact is emerging already. This view is scientific and spiritual in equal measure and will value what the greatest scientists of history themselves always valued above all: truth. 
 
 Proof of Heaven by Eben Alexander, M.D. To be published by Simon & Schuster, Inc.. Copyright (c) 2012 by Eben Alexander III, M.D. 
 
 This new picture of reality will take a long time to put together. It won’t be finished in my time, or even, I suspect, my sons’ either. In fact, reality is too vast, too complex, and too irreducibly mysterious for a full picture of it ever to be absolutely complete. But in essence, it will show the universe as evolving, multi-dimensional, and known down to its every last atom by a God who cares for us even more deeply and fiercely than any parent ever loved their child. ||||| Once upon a time, a neurosurgeon named Eben Alexander contracted a bad case of bacterial meningitis and fell into a coma. While immobile in his hospital bed, he experienced visions of such intense beauty that they changed everything—not just for him, but for all of us, and for science as a whole. According to Newsweek, Alexander’s experience proves that consciousness is independent of the brain, that death is an illusion, and that an eternity of perfect splendor awaits us beyond the grave—complete with the usual angels, clouds, and departed relatives, but also butterflies and beautiful girls in peasant dress. Our current understanding of the mind “now lies broken at our feet”—for, as the doctor writes, “What happened to me destroyed it, and I intend to spend the rest of my life investigating the true nature of consciousness and making the fact that we are more, much more, than our physical brains as clear as I can, both to my fellow scientists and to people at large.” 
 
 Well, I intend to spend the rest of the morning sparing him the effort. Whether you read it online or hold the physical object in your hands, this issue of Newsweek is best viewed as an archaeological artifact that is certain to embarrass us in the eyes of future generations. Its existence surely says more about our time than the editors at the magazine meant to say—for the cover alone reveals the abasement and desperation of our journalism, the intellectual bankruptcy and resultant tenacity of faith-based religion, and our ubiquitous confusion about the nature of scientific authority. The article is the modern equivalent of a 14th-century woodcut depicting the work of alchemists, inquisitors, Crusaders, and fortune-tellers. I hope our descendants understand that at least some of us were blushing. 
 
 As many of you know, I am interested in “spiritual” experiences of the sort Alexander reports. Unlike many atheists, I don’t doubt the subjective phenomena themselves—that is, I don’t believe that everyone who claims to have seen an angel, or left his body in a trance, or become one with the universe, is lying or mentally ill. Indeed, I have had similar experiences myself in meditation, in lucid dreams (even while meditating in a lucid dream), and through the use of various psychedelics (in times gone by). I know that astonishing changes in the contents of consciousness are possible and can be psychologically transformative. 
 
 And, unlike many neuroscientists and philosophers, I remain agnostic on the question of how consciousness is related to the physical world. There are, of course, very good reasons to believe that it is an emergent property of brain activity, just as the rest of the human mind obviously is. But we know nothing about how such a miracle of emergence might occur. And if consciousness were, in fact, irreducible—or even separable from the brain in a way that would give comfort to Saint Augustine—my worldview would not be overturned. I know that we do not understand consciousness, and nothing that I think I know about the cosmos, or about the patent falsity of most religious beliefs, requires that I deny this. So, although I am an atheist who can be expected to be unforgiving of religious dogma, I am not reflexively hostile to claims of the sort Alexander has made. In principle, my mind is open. (It really is.) 
 
 But Alexander’s account is so bad—his reasoning so lazy and tendentious—that it would be beneath notice if not for the fact that it currently disgraces the cover of a major newsmagazine. Alexander is also releasing a book at the end of the month, Proof of Heaven: A Neurosurgeon’s Journey into the Afterlife, which seems destined to become an instant bestseller. As much as I would like to simply ignore the unfolding travesty, it would be derelict of me to do so. 
 
 But first things first: You really must read Alexander’s article. 
 
 I trust that doing so has given you cause to worry that the good doctor is just another casualty of American-style Christianity—for though he claims to have been a nonbeliever before his adventures in coma, he presents the following self-portrait: 
 
 Although I considered myself a faithful Christian, I was so more in name than in actual belief. I didn’t begrudge those who wanted to believe that Jesus was more than simply a good man who had suffered at the hands of the world. I sympathized deeply with those who wanted to believe that there was a God somewhere out there who loved us unconditionally. In fact, I envied such people the security that those beliefs no doubt provided. But as a scientist, I simply knew better than to believe them myself. 
 
 What it means to be a “faithful Christian” without “actual belief” is not spelled out, but few nonbelievers will be surprised when our hero’s scientific skepticism proves no match for his religious conditioning. Most of us have been around this block often enough to know that many “former atheists”—like Francis Collins—spent so long on the brink of faith, and yearned for its emotional consolations with such vampiric intensity, that the slightest breeze would send them spinning into the abyss. For Collins, you may recall, all it took to establish the divinity of Jesus and the coming resurrection of the dead was the sight of a frozen waterfall. Alexander seems to have required a ride on a psychedelic butterfly. In either case, it’s not the perception of beauty we should begrudge but the utter absence of intellectual seriousness with which the author interprets it. 
 
 Everything—absolutely everything—in Alexander’s account rests on repeated assertions that his visions of heaven occurred while his cerebral cortex was “shut down,” “inactivated,” “completely shut down,” “totally offline,” and “stunned to complete inactivity.” The evidence he provides for this claim is not only inadequate—it suggests that he doesn’t know anything about the relevant brain science. Perhaps he has saved a more persuasive account for his book—though now that I’ve listened to an hour-long interview with him online, I very much doubt it. In his Newsweek article, Alexander asserts that the cessation of cortical activity was “clear from the severity and duration of my meningitis, and from the global cortical involvement documented by CT scans and neurological examinations.” To his editors, this presumably sounded like neuroscience. 
 
 The problem, however, is that “CT scans and neurological examinations” can’t determine neuronal inactivity—in the cortex or anywhere else. And Alexander makes no reference to functional data that might have been acquired by fMRI, PET, or EEG—nor does he seem to realize that only this sort of evidence could support his case. Obviously, the man’s cortex is functioning now—he has, after all, written a book—so whatever structural damage appeared on CT could not have been “global.” (Otherwise, he would be claiming that his entire cortex was destroyed and then grew back.) Coma is not associated with the complete cessation of cortical activity, in any case. And to my knowledge, almost no one thinks that consciousness is purely a matter of cortical activity. Alexander’s unwarranted assumptions are proliferating rather quickly. Why doesn’t he know these things? He is, after all, a neurosurgeon who survived a coma and now claims to be upending the scientific worldview on the basis of the fact that his cortex was totally quiescent at the precise moment he was enjoying the best day of his life in the company of angels. Even if his entire cortex had truly shut down (again, an incredible claim), how can he know that his visions didn’t occur in the minutes and hours during which its functions returned? 
 
 I confess that I found Alexander’s account so alarmingly unscientific that I began to worry that something had gone wrong with my own brain. So I sought the opinion of Mark Cohen, a pioneer in the field of neuroimaging who holds appointments in the Departments of Psychiatry & Biobehavioral Science, Neurology, Psychology, Radiological Science, and Bioengineering at UCLA. (He was also my thesis advisor.) Here is part of what he had to say: 
 
 This poetic interpretation of his experience is not supported by evidence of any kind. As you correctly point out, coma does not equate to “inactivation of the cerebral cortex” or “higher-order brain functions totally offline” or “neurons of [my] cortex stunned into complete inactivity”. These describe brain death, a one hundred percent lethal condition. There are many excellent scholarly articles that discuss the definitions of coma. (For example: 1 & 2) 
 
 
 
 We are not privy to his EEG records, but high alpha activity is common in coma. Also common is “flat” EEG. The EEG can appear flat even in the presence of high activity, when that activity is not synchronous. For example, the EEG flattens in regions involved in direct task processing. This phenomenon is known as event-related desynchronization (hundreds of references). 
 
 
 
 As is obvious to you, this is truth by authority. Neurosurgeons, however, are rarely well-trained in brain function. Dr. Alexander cuts brains; he does not appear to study them. “There is no scientific explanation for the fact that while my body lay in coma, my mind—my conscious, inner self—was alive and well. While the neurons of my cortex were stunned to complete inactivity by the bacteria that had attacked them, my brain-free consciousness ...” True, science cannot explain brain-free consciousness. Of course, science cannot explain consciousness anyway. In this case, however, it would be parsimonious to reject the whole idea of consciousness in the absence of brain activity. Either his brain was active when he had these dreams, or they are a confabulation of whatever took place in his state of minimally conscious coma. 
 
 
 
 There are many reports of people remembering dream-like states while in medical coma. They lack consistency, of course, but there is nothing particularly unique in Dr. Alexander’s unfortunate episode. 
 
 Okay, so it appears that my own cortex hasn’t completely shut down. In fact, there are further problems with Alexander’s account. Not only does he appear ignorant of the relevant science, but he doesn’t realize how many people have experienced visions similar to his while their brains were operational. In his online interview we learn about the kinds of conversations he’s now having with skeptics: 
 
 I guess one could always argue, “Well, your brain was probably just barely able to ignite real consciousness and then it would flip back into a very diseased state,” which doesn’t make any sense to me. Especially because that hyper-real state is so indescribable and so crisp. It’s totally unlike any drug experience. A lot of people have come up to me and said, “Oh that sounds like a DMT experience,” or “That sounds like ketamine.” Not at all. That is not even in the right ballpark. 
 
 
 
 Those things do not explain the kind of clarity, the rich interactivity, the layer upon layer of understanding and of lessons taught by deceased loved ones and spiritual beings. 
 
 “Not even in the right ballpark”? His experience sounds so much like a DMT trip that we are not only in the right ballpark, we are talking about the stitching on the same ball. Here is Alexander’s description of the afterlife: 
 
 I was a speck on a beautiful butterfly wing; millions of other butterflies around us. We were flying through blooming flowers, blossoms on trees, and they were all coming out as we flew through them… [there were] waterfalls, pools of water, indescribable colors, and above there were these arcs of silver and gold light and beautiful hymns coming down from them. Indescribably gorgeous hymns. I later came to call them “angels,” those arcs of light in the sky. I think that word is probably fairly accurate…. 
 
 
 
 Then we went out of this universe. I remember just seeing everything receding and initially I felt as if my awareness was in an infinite black void. It was very comforting but I could feel the extent of the infinity and that it was, as you would expect, impossible to put into words. I was there with that Divine presence that was not anything that I could visibly see and describe, and with a brilliant orb of light…. 
 
 
 
 They said there were many things that they would show me, and they continued to do that. In fact, the whole higher-dimensional multiverse was this incredibly complex corrugated ball and all these lessons coming into me about it. Part of the lessons involved becoming all of what I was being shown. It was indescribable. 
 
 
 
 But then I would find myself—and time out there I can say is totally different from what we call time. There was access from out there to any part of our space/time and that made it difficult to understand a lot of these memories because we always try to sequence things and put them in linear form and description. That just really doesn’t work. 
 
 Everything that Alexander describes here and in his Newsweek article, including the parts I have left out, has been reported by DMT users. The similarity is uncanny. Here is how the late Terence McKenna described the prototypical DMT trance: 
 
 Under the influence of DMT, the world becomes an Arabian labyrinth, a palace, a more than possible Martian jewel, vast with motifs that flood the gaping mind with complex and wordless awe. Color and the sense of a reality-unlocking secret nearby pervade the experience. There is a sense of other times, and of one’s own infancy, and of wonder, wonder and more wonder. It is an audience with the alien nuncio. In the midst of this experience, apparently at the end of human history, guarding gates that seem surely to open on the howling maelstrom of the unspeakable emptiness between the stars, is the Aeon. The Aeon, as Heraclitus presciently observed, is a child at play with colored balls. Many diminutive beings are present there—the tykes, the self-transforming machine elves of hyperspace. Are they the children destined to be father to the man? One has the impression of entering into an ecology of souls that lies beyond the portals of what we naively call death. I do not know. Are they the synesthetic embodiment of ourselves as the Other, or of the Other as ourselves? Are they the elves lost to us since the fading of the magic light of childhood? Here is a tremendum barely to be told, an epiphany beyond our wildest dreams. Here is the realm of that which is stranger than we can suppose. Here is the mystery, alive, unscathed, still as new for us as when our ancestors lived it fifteen thousand summers ago. The tryptamine entities offer the gift of new language, they sing in pearly voices that rain down as colored petals and flow through the air like hot metal to become toys and such gifts as gods would give their children. The sense of emotional connection is terrifying and intense. The Mysteries revealed are real and if ever fully told will leave no stone upon another in the small world we have gone so ill in. This is not the mercurial world of the UFO, to be invoked from lonely hilltops; this is not the siren song of lost Atlantis wailing through the trailer courts of crack-crazed America. DMT is not one of our irrational illusions. I believe that what we experience in the presence of DMT is real news. It is a nearby dimension—frightening, transformative, and beyond our powers to imagine, and yet to be explored in the usual way. We must send fearless experts, whatever that may come to mean, to explore and to report on what they find. (Terence McKenna, Food of the Gods, pp. 258-259.) 
 
 Alexander believes that his E. coli-addled brain could not have produced his visions because they were too “intense,” too “hyper-real,” too “beautiful,” too “interactive,” and too drenched in significance for even a healthy brain to conjure. He also appears to think that despite their timeless quality, his visions could not have arisen in the minutes or hours during which his cortex (which surely never went off) switched back on. He clearly knows nothing about what people with working brains experience under the influence of psychedelics. Nor does he know that visions of the sort that McKenna describes, although they may seem to last for ages, require only a brief span of biological time. Unlike LSD and other long-acting psychedelics, DMT alters consciousness for merely a few minutes. Alexander would have had more than enough time to experience a visionary ecstasy as he was coming out of his coma (whether his cortex was rebooting or not). 
 
 Does Alexander know that DMT already exists in the brain as a neurotransmitter? Did his brain experience a surge of DMT release during his coma? This is pure speculation, of course, but it is a far more credible hypothesis than that his cortex “shut down,” freeing his soul to travel to another dimension. As one of his correspondents has already informed him, similar experiences can be had with ketamine, which is a surgical anesthetic that is occasionally used to protect a traumatized brain. Did Alexander by any chance receive ketamine while in the hospital? Would he even think it relevant if he had? His assertion that psychedelics like DMT and ketamine “do not explain the kind of clarity, the rich interactivity, the layer upon layer of understanding” he experienced is perhaps the most amazing thing he has said since he returned from heaven. Such compounds are universally understood to do the job. And most scientists believe that the reliable effects of psychedelics indicate that the brain is at the very least involved in the production of visionary states of the sort Alexander is talking about. 
 
 Again, there is nothing to be said against Alexander’s experience. It sounds perfectly sublime. And such ecstasies do tell us something about how good a human mind can feel. The problem is that the conclusions Alexander has drawn from his experience—he continually reminds us, as a scientist—are based on some very obvious errors in reasoning and gaps in his understanding. 
 
 Let me suggest that, whether or not heaven exists, Alexander sounds precisely how a scientist should not sound when he doesn’t know what he is talking about. And his article is not the sort of thing that the editors of a once-important magazine should publish if they hope to reclaim some measure of respect for their battered brand.
– Dr. Eben Alexander held a scientific worldview until, he says, he went to heaven. As a nominal Christian—and a neurosurgeon with Harvard credentials—Alexander admits he had envied "those who wanted to believe that there was a God somewhere out there who loved us unconditionally," he writes at the Daily Beast. Then he contracted meningitis and slipped into a 7-day coma that shut down "the human part of my brain, the neocortex." Incredibly, Alexander visited a realm of clouds, higher beings, and a God-like wind that told him he was "loved and cherished, dearly, forever." Now Alexander is encountering different beings—colleagues who give him "looks of polite disbelief" when he tells his story. In church, however, he "saw everything with fresh eyes," feeling again the universal love of his journey in the stained-glass windows, bass notes of the organ, and a painting of Jesus. And he is calling on scientists to paint "a new picture of reality" as an "evolving, multi-dimensional" universe with an all-knowing God. Click for the full article and its fiery comments section—or read this criticism of Alexander's science by Sam Harris.