The debate about near-death experiences almost always turns on the same few seconds: what happens in the brain during cardiac arrest? In the process, perhaps the most remarkable part is lost from view – because it does not take place during the experience at all, but afterwards, and it lasts not seconds but decades. People return from a near-death experience changed, and that change is deeper, more stable and more uniform than after almost any other inner event we know of.
What changes
The reported after-effects are strikingly uniform across decades and cultures. Again and again, experiencers describe:
- a far-reaching loss of the fear of death – often the most decisive consequence;
- a waning interest in status, possessions and money;
- more compassion, patience and willingness to help others;
- a heightened need for meaning, knowledge and inner growth;
- a deepened, frequently non-denominational spirituality and the conviction that consciousness outlasts death.
What is remarkable is not that a momentous event changes anyone at all – severe crises often do. What is remarkable is the direction, the uniformity and above all the duration. This is exactly where the robust research begins.
Van Lommel (2001): the controlled proof of duration
In 2001 the Dutch cardiologist Pim van Lommel published a prospective study in The Lancet that lifted the topic out of the anecdotal: 344 resuscitated cardiac-arrest patients from ten Dutch hospitals, recorded consecutively and by a fixed protocol. 62 of them (18%) reported a near-death experience, 41 (12%) a pronounced "core experience".
The part decisive for our question is the longitudinal one: van Lommel re-interviewed the survivors after two and after eight years – and compared the experiencers with a control group who had survived the same cardiac arrest but had no near-death experience. That is the real point: both groups had been equally close to death. If the transformation were merely the effect of the shock "I nearly died", both groups would have to change alike.
They did not. The group with a near-death experience showed markedly stronger and more specific changes after eight years: less fear of death, a stronger belief in survival, more acceptance of others and compassion, less interest in possessions and money, more searching for meaning. And – crucially – after eight years the changes had not faded but had grown further. The shock alone does not explain this; it is the experience itself that goes on working.
Greyson (2022): does it really last?
Even eight years could in theory still be a long after-echo. Bruce Greyson therefore went to the limit of what can be measured: in 63 experiencers he compared the scores of a standardised questionnaire on life changes (the Life-Changes Inventory) at two points roughly twenty years apart. The result: the scores remained statistically constant over two decades – both overall and across the individual value domains. He also found a relationship between the intensity of the near-death experience and the extent of change: the deeper the experience, the greater the lasting effect.
Why this counts against the hallucination hypothesis
Here the circle closes with the memory argument. A hallucination, a fever dream or a delirium typically leaves confusion, at best an anecdote – but it does not rebuild a personality, let alone hold it stable for twenty years. It is precisely this unusual, lasting, clearly directed effect that is hard to reconcile with "it was just a mirage of the dying brain".
But staying honest also means: there is one partial analogue. The psychedelic "mystical" experience can likewise bring about lasting personality change – in a controlled Johns Hopkins study, after a psilocybin-occasioned mystical experience the personality domain of openness rose measurably and stayed elevated for more than a year (MacLean, Johnson & Griffiths 2011). Yet the finding does not support the scepticism, it relocates it: what predicted the lasting change there was not the substance or the dose, but the mystical, NDE-like quality of the experience. Here too, then, the arrow points back to the experience itself, not to a mere chemical side-effect.
What it shows – and what it does not
Let us stay precise: a deep, stable, life-changing effect proves that the experience was real and meaningful to the person and possesses an unusual power – it does not, on its own, prove that there is an afterlife "out there". A strong effect can have many causes. What the transformation does is something else, and yet weighty: it makes the most convenient explanation – "just a hallucination" – implausible, because hallucinations do not work like that.
Whether the experience touches a reality outside the brain is decided elsewhere: by veridical perception. Memory, consistency and transformation together clear away the popular objections and keep the real question open – alive, rather than closed prematurely.
Sources:
• van Lommel P. et al. (2001), Near-death experience in survivors of cardiac arrest: a prospective study in the Netherlands, The Lancet 358(9298):2039–2045 (doi).
• Greyson B. (2022), Persistence of Attitude Changes After Near-Death Experiences: Do They Fade Over Time?, Journal of Nervous and Mental Disease 210(9):692–696 (doi).
• MacLean K. A., Johnson M. W. & Griffiths R. R. (2011), Mystical experiences occasioned by the hallucinogen psilocybin lead to increases in the personality domain of openness, Journal of Psychopharmacology 25(11):1453–1461 (doi).
Continue in our curated knowledge collection – see also "Just a hallucination?" and memory research, the portrait of Kenneth Ring with his transformation thesis, the life review and the question of brain and consciousness.