Chapter 2

What Is a Near-Death Experience? Definitions, Core Features, and a Brief History of NDE Research

Before we can ask whether near-death experiences (NDEs) are real, whether they line up with the Bible, or whether they tell us something true about the soul, we have to know what we are talking about. That sounds simple. It isn't. The phrase "near-death experience" gets tossed around in talk shows, magazine articles, viral videos, and paperback memoirs — and along the way the term has been stretched and sometimes badly misused. So this chapter is a careful first step. We will define our terms, sort the real thing from look-alikes, walk through the core features that show up again and again, and trace the short but rigorous history of how scientists and doctors have studied this phenomenon for over fifty years.

My thesis here is straightforward. NDEs are a well-documented, cross-cultural phenomenon with remarkably consistent core features. They have been studied by competent medical researchers and academics for more than five decades. And they cannot be responsibly dismissed as mere hallucination or fraud. You are free to disagree about what NDEs mean — that's a debate we'll spend many chapters working through. But you are no longer free, in 2026, to claim there is nothing here to study. There is. A great deal.

Defining the Near-Death Experience

Three definitions are useful — a popular one, a medical one, and a measurable one.

The popular definition came from the man who coined the term itself. In 1975, a young philosopher and physician named Raymond Moody published Life After Life, a small book that would go on to sell more than thirteen million copies and create an entire field of research almost overnight.¹ Moody had been collecting stories from people who survived close brushes with death — cardiac arrests, car wrecks, drownings, surgeries — and noticed that many of them described strangely similar things. He pulled the common features together into a composite description and called the phenomenon a "near-death experience." Moody's definition was descriptive, not technical: an NDE is the profound experience reported by some people during a time when they were close to death or clinically dead.²

Doctors and researchers needed something more precise. The medical definition refined the popular one in two ways. First, it required that the person be genuinely close to death — typically unconscious, often clinically dead with no heartbeat or breathing — not merely scared or in danger. Second, it required an inward experience during that time, something the person could later describe. As cardiologist and NDE researcher Jeffrey Long puts it, NDEs happen when a person is "so physically compromised from an accident or illness that they are generally unconscious and may be clinically dead, with no heartbeat or breathing."³ During that window of unconsciousness, the experience occurs.

The third definition is the most useful for research. In 1983, psychiatrist Bruce Greyson — now a professor of psychiatry at the University of Virginia and the leading academic researcher in this field — developed the Greyson NDE Scale.⁴ The scale asks sixteen specific questions about the content of the experience: Did your thoughts speed up? Did you feel separated from your body? Did you see a brilliant light? Did you encounter a mystical being? Each item is scored 0, 1, or 2, for a possible total of 32 points. A score of 7 or higher qualifies the experience as a true NDE. Scores below that may describe something interesting — a vision, a moment of peace, a sense of warmth — but not the full pattern that researchers have learned to recognize.⁵

Why does a measurable scale matter so much? Because without it, "near-death experience" becomes whatever anyone wants it to be. Cardiologist Michael Sabom, in his landmark Atlanta Study of NDE patients, used the Greyson Scale specifically because it allowed him to be sure each person in his study had really had the same kind of experience.⁶ A standard tool keeps researchers honest. It separates strong cases from weak ones. And it lets different research teams in different countries compare apples to apples.

What an NDE Is Not

A clear definition also has to draw boundaries. Several other experiences resemble NDEs but are not the same thing, and confusing them muddies every conversation.

NDEs are not dreams. Dreams are jumpy, fragmented, and usually fade quickly. NDEs are reported as intensely lucid, clearly ordered, and impossible to forget — even decades later. Long observed that NDE accounts unfold in a "consistent narrative" with a "predictable order of elements," which is not how dreams behave at all.⁷

NDEs are not hallucinations. Hallucinations are private, distorted, and usually frightening or fragmented. They reflect the malfunctioning brain that produces them. NDEs, by contrast, are described by experiencers as "more real than real" — sharper, clearer, and more vivid than ordinary waking life. And, as we will see in coming chapters, NDErs sometimes report verifiable facts about events that actually happened during their unconsciousness, which no hallucination could produce.

NDEs are not psychotic episodes. Psychotic experiences are typically tied to mental illness, persist over time, and are accompanied by other signs of disordered thinking. NDEs occur in psychologically healthy people who, before and after the event, function normally — often better than normal.

NDEs are not drug trips. Some NDE-like experiences can be triggered by drugs such as DMT or ketamine. But these have content, structure, and aftereffects that differ in important ways from genuine NDEs. We'll take this up more carefully in Chapter 3 and Appendix B. For now it's enough to note that researchers like Greyson and Long screen for drug involvement and treat drug-induced experiences as a separate category.

NDEs are not the same as deathbed experiences (DBEs). A deathbed experience happens to a dying person who does not come back — they typically die shortly after. Deathbed visions are a closely related phenomenon and a powerful complementary witness to the afterlife, but they are different in form, timing, and outcome. Chapter 4 is dedicated to DBEs in their own right.

NDEs are not the same as out-of-body experiences (OBEs). An OBE is one common component of many NDEs, but OBEs can occur without a near-death event (during meditation, trauma, or spontaneously), and many NDEs include elements far beyond the OBE. Chapter 11 will treat OBEs in depth.

Finally, simply coming close to death is not the same as having an NDE. Most people who survive cardiac arrest report nothing. Roughly 10 to 20 percent of cardiac arrest survivors report a true NDE — meaningful, but a minority.⁸ Whatever NDEs are, they are not automatic. Something more than dying is going on.

The Core Features

From Moody's first interviews in the early 1970s through Long's NDERF (Near-Death Experience Research Foundation) database, which now holds more than 5,000 accounts, researchers keep finding the same elements showing up again and again, often in roughly the same order.⁹ No two NDEs are identical, and not every NDE includes every feature. But the pattern is unmistakable. Long identified twelve recurring elements; Burke summarizes them with the percentages from Long's analysis of 1,300 cases.¹⁰ Let me walk you through them briefly. We will explore many of these in much greater depth in later chapters, so I'll keep each one short here.

The out-of-body experience (OBE). Reported by 75.4 percent of NDErs. The person feels themselves separating from their physical body and watches the scene below — usually their own resuscitation — from an elevated vantage point. We will return to this in Chapter 11.

Heightened senses and cognition. 74.4 percent report being "more conscious and alert than normal." This is one of the most striking findings in the entire field. A dying brain should produce duller, slower, more confused thought. Instead, NDErs describe sharper sight, faster thinking, and a clarity that makes ordinary life feel foggy by comparison. This is a serious problem for the dying-brain hypothesis.

Intense positive emotions. 76.2 percent describe "incredible peace." Many add words like "love," "joy," and "bliss." Sabom found that 87 percent of his Atlanta Study NDErs felt "incredible peace or painlessness" during the experience.¹¹

Movement through a tunnel or passage. About 33.8 percent report this. It is well-known in popular culture but is actually one of the less universal features.

Encounter with a brilliant light. 64.6 percent. The light is described as warm, loving, intelligent, and somehow personal — the source of the love rather than just a backdrop to it. We will treat this more carefully in Chapter 12.

Encounter with deceased relatives or friends, or with mystical beings. 57.3 percent. Sometimes these reunions involve people the NDEr did not even know had died. Chapter 14 takes up these cases.

Alteration of time or space. 60.5 percent. NDErs describe time stopping, expanding, or ceasing to exist. Chapter 16 is devoted to this.

The life review. 22.2 percent. A panoramic, often instantaneous replay of the person's entire life, with strong emphasis on how their actions affected other people. Chapter 15 explores this.

Encountering heavenly realms. 52.2 percent. Gardens, cities, meadows, and landscapes of indescribable beauty. See Chapter 17.

Encountering or learning special knowledge. 56 percent. NDErs often report that, for a time, they understood everything — the universe, themselves, the meaning of their lives — and that this knowledge faded as they returned.

Encountering a boundary or barrier. 31 percent. A river, fence, wall, or threshold beyond which the person could not pass.

Being told or choosing to return. 58.5 percent were aware of a decision regarding their return — either being told "it is not your time" or being given a choice to stay or come back, often for the sake of children or unfinished work.

To these twelve, researchers also add a thirteenth that unfolds after the event: profound aftereffects. NDErs consistently describe long-term changes that linger for decades — loss of fear of death, increased compassion, decreased materialism, deeper spirituality, and a stronger commitment to relationships.¹² Sabom's Atlanta Study, using a Life Changes Questionnaire, compared NDErs with a control group of cardiac surgery survivors who had not had an NDE. The increases in faith, meaning in life, and capacity for love were significantly greater in the NDE group.¹³ Whatever an NDE is, it is not a passing fluke. It changes people.

A Brief History of NDE Research

NDEs are not a 1970s invention. The phenomenon stretches back as far as recorded history.

Pre-modern accounts. Plato's Republic (around 380 B.C.) closes with the "Myth of Er" — the story of a soldier who returned from the dead to describe the journey of souls. The medieval church preserved many similar accounts: the visions of Drythelm in the Venerable Bede's history, the ecstatic experience of Catherine of Siena, the testimony of Saint Perpetua before her martyrdom.¹⁴ Pope Gregory the Great recorded several near-death visions in his Dialogues. As Tabatt notes in The NDE Conspiracy, NDEs have been part of the human story for millennia, even if the term itself is recent.¹⁵ Miller's careful work on cross-cultural sources cautions us, however, that not every ancient "otherworld journey" lines up with a modern NDE — many were visions, pilgrimages, or didactic stories rather than experiences during clinical death.¹⁶ Still, the basic pattern — leaving the body, encountering light, meeting the dead, returning — appears across centuries and continents.

Raymond Moody, Life After Life (1975). The modern era began with Moody. He was a philosophy graduate student at the University of Virginia when he heard psychiatrist George Ritchie describe his own NDE. Moody began asking his philosophy students whether they had ever heard of such a thing — and to his amazement, "about one out of every thirty students" came up to report something similar.¹⁷ He started collecting accounts. Life After Life coined the term "near-death experience," sketched the core features, and turned an obscure clinical anomaly into an international conversation. Moody's work was descriptive, not statistical, but he opened the door.

Kenneth Ring, Life at Death (1980) and Heading Toward Omega (1984). Ring, a psychologist at the University of Connecticut, brought rigor where Moody had brought stories. He used standardized interviews, statistical analysis, and a structured scoring system. He identified what he called the "core NDE" — the cluster of features that recurs across cultures, religions, and personal histories. Later, with Sharon Cooper, Ring conducted the famous Mindsight study of NDEs in blind people, including some blind from birth — a study we'll examine carefully in Chapter 8.

Michael Sabom, Recollections of Death (1982) and Light and Death (1998). Sabom is a cardiologist, a committed Christian, and a Presbyterian church elder. He started out a skeptic. After hearing about Moody's work he set out to debunk it — and ended up convinced. Sabom's contribution was twofold: he brought medical rigor to the field, comparing patient accounts with their actual hospital records, and he engaged the theological implications head-on. His Atlanta Study (1994–1996) followed 160 patients, 47 of whom had NDEs, using the Greyson Scale and the Life Changes Questionnaire. The results showed that NDEs do not pull people away from biblical Christianity — they tend to deepen Christian faith.¹⁸

Pim van Lommel and the Lancet study (2001). If you want a single moment when NDE research came of age scientifically, this is it. Van Lommel, a Dutch cardiologist, and his colleagues studied 344 consecutive cardiac arrest patients across ten Dutch hospitals over a thirteen-year period. Sixty-two of them — 18 percent — reported NDEs. The study was prospective (patients were identified as they came in, before they could be influenced by NDE literature), controlled (NDErs were compared with cardiac arrest survivors who reported no NDE), and published in The Lancet, one of the most prestigious medical journals in the world. After this paper, no honest researcher could call NDEs unscientific.

Sam Parnia and the AWARE studies (2014, 2022). Parnia, a critical care physician, has led the most ambitious prospective studies yet. AWARE I spanned fifteen hospitals in three countries; AWARE II is still ongoing. Parnia's team even hid visual targets on shelves above patient beds to test whether people who reported floating above the room could actually see them. AWARE I found that 39 percent of cardiac arrest survivors who could be interviewed had some kind of awareness during the time they were clinically dead, even though most did not have full NDEs. We'll return to AWARE in Chapter 6.

Jeffrey Long, Evidence of the Afterlife (2010) and God and the Afterlife (2016). Long is a radiation oncologist who founded NDERF in 1998. The site collects NDE accounts from around the world through a structured questionnaire that includes the Greyson Scale items. Over five thousand accounts have come in, translated from more than twenty languages by hundreds of multilingual volunteers.¹⁹ In God and the Afterlife, Long analyzed 420 qualifying NDEs to study how God is described in these reports — the largest such study ever attempted.²⁰

Bruce Greyson, After (2021). Greyson — the same researcher who designed the NDE Scale — distilled four decades of his own work and the broader literature into a single comprehensive book. With more than 100 peer-reviewed articles to his name, Greyson is the dean of academic NDE research. After is the most authoritative single-volume overview from inside the field.

Penny Sartori, The Wisdom of Near-Death Experiences (2014). Sartori, a UK intensive-care nurse, conducted a five-year prospective study in a Welsh hospital. She did something simple and powerful: she compared NDErs' descriptions of their resuscitations with the guesses of seasoned cardiac patients who had not had NDEs. The control patients got the procedures wrong almost across the board. The NDErs got them right. As we'll see in Chapter 6, this kind of comparative work is some of the strongest evidence in the entire field.

The Cross-Cultural Datum

One last point deserves its own section because it carries so much evidential weight. NDEs occur across cultures, religions, age groups, and medical conditions. They are reported by Christians, Muslims, Hindus, Buddhists, Jews, atheists, and agnostics. They occur in industrialized hospitals and in remote villages. They happen to seven-year-olds and to ninety-year-olds. And the core features — the OBE, the light, the deceased, the love, the boundary — appear in all of them.

Long has tested this directly. In one comparison of 79 non-English NDEs against 583 English ones, all thirty-three NDE elements appeared in both groups, and no element occurred statistically more or less often in either.²¹ Miller's reading of Long's database, looking at thousands of cases, came to the same conclusion: there is no evidence that NDEs are products of cultural beliefs or prior life experiences.²² If NDEs were the product of cultural expectation, we would expect a kaleidoscope of contradictory experiences — Hindus seeing Krishna at the gates, Muslims seeing Muhammad, atheists seeing nothing at all. We don't get that. We get the same passage, the same light, the same love, with cultural variation in interpretation rather than core content.

The skeptical philosopher will rightly want to push back here — and we will give those objections fair hearing in Chapter 3 and especially in Appendix B. For now I'll just note that John W. Cooper, in his classic biblical defense of dualism, judged that "the evidence from different sorts of near-death experiences tends to support dualism and requires more than a standard physiological account of consciousness."²³ Cooper is appropriately cautious — he does not think NDEs by themselves prove the soul exists — but he is right that the data demand more than a wave of the hand.

Conclusion

So what is a near-death experience? It is a profound subjective experience occurring when a person is close to death or clinically dead, scoring 7 or higher on the 32-point Greyson NDE Scale. It is distinct from dreams, hallucinations, drug trips, deathbed visions, and ordinary out-of-body experiences. It includes a recurring set of core features — separation from the body, heightened cognition, intense positive emotion, a brilliant light, meetings with the dead and with luminous beings, life review, otherworldly landscapes, altered time, a boundary, and a return — usually in a consistent order. It produces deep, lasting changes in the people who have one. And it has been studied by serious medical researchers for over fifty years, in prospective hospital studies and peer-reviewed journals, across more than twenty languages and dozens of cultures.

We have not yet asked whether what NDErs experience is real, what causes it, whether the soul is involved, or how a Christian should think about it. Those questions will fill the rest of this book. What I hope this chapter has done is clear away the easiest dismissals. The next time someone tells you NDEs are "just" hallucinations or "just" something Raymond Moody made up in 1975, you'll know better. There is a real phenomenon here, well-defined and well-documented. And if you are a Christian, I think it is worth your time most of all — because, as we'll see, what these millions of experiencers describe lines up with the Bible's picture of the soul, the afterlife, and the God who meets us at the threshold of death far more often, and far more deeply, than most Christians have ever realized.