The Science Behind Mystical Experiences
Imagine sitting with someone whose world has quietly shattered and reassembled itself into a new geometry of meaning, one where the edges of self blur into something vast and uncapturable. These moments, often called mystical experiences, resist easy definition or containment. They are not mere fantasies or hallucinations, but shifts in consciousness that ripple through one’s sense of identity, time, and belonging, leaving a subtle yet unmistakable impression like a stone dropped into still water, its rings expanding and touching unseen shores. For many years, such phenomena were tucked away in the margins of religion or dismissed as anomalies...an overactive mind, a whimsy of the nervous system. But what if the mind’s seeming eccentricities are actually invitations to look deeper at the architecture of awareness itself?
In the last few decades, a quiet revolution has unfolded in the laboratories and clinics exploring these experiences. Through the lens of neuroscience and the tools of neuroimaging, what was once considered intangible has begun to reveal its contours. Stay with me here. Functional MRI and EEG scans show us the brain’s symphony during moments of ego dissolution, timelessness, and unity...moments that might otherwise seem ineffable or ephemeral. The patterns emerging speak not just to individual stories, but to reproducible biological states, bridging the gap between subjective awe and objective study. This unfolding inquiry invites us to rethink what it means to be human, not as a separate self trapped in the gears of mind, but as an open field of awareness pulsating with potential.
I've sat with this question myself. In witnessing these states, one begins to sense a shift not only in individual perception but in what might be possible for collective understanding and healing. I know, I know, it sounds strange. But could these states be a key to opening wide the doors of conventional experience and stepping beyond the habitual divide of self and other?
Mapping the Mystical: Brain Activity During Altered States
The phrase “mystical experience” often summons images of ascetics withdrawing into caves or saints lost in ecstatic rapture, yet the core of these moments is a constellation of common feelings: an expansive unity, an encounter with what feels sacred or infinite, a mood of radiant positivity, and a sense that time and space dissolve and reconfigure. Such qualities recur across cultures and centuries, whether these experiences arise from deep meditation, near-death episodes, or the ingestion of certain plant medicines. Herein lies a subtle paradox: these are intensely personal, subjective states that nevertheless bear a striking phenomenological resemblance worldwide. What might this universality signal? Something about the very nature of consciousness or brain function itself, perhaps?
Early scientific steps into this terrain were cautious, relying on advances like functional magnetic resonance imaging and electroencephalography to peek into the brain’s activity as these states unfolded. What emerged was unexpected: rather than increased activity everywhere, one of the most consistent neural signatures was a decrease in activity within the default mode network, or DMN. The DMN is a constellation of brain regions active when the mind is left to wander, when one reflects on oneself, mentally rehearses the future, or ruminates about the past. In many ways, it is the stage upon which the ego’s narrative performs...the continuous story of “I” and “mine.” When this network’s chatter quiets, the tight boundaries of self that normally shape experience begin to soften. Robin Carhart-Harris and colleagues captured this beautifully during studies with psilocybin, revealing how the DMN’s suppression opens a door to the feeling of “oneness” or interconnectedness, where the self’s separate storyline loosens and a broader field of awareness opens.
Many people find How to Change Your Mind by Michael Pollan (paid link) helpful during this phase.
It's not a shutdown but a recalibration. When the DMN quiets, regions of the brain that rarely converse begin to synchronize, weaving new patterns of connectivity that disrupt habitual mental loops. This increased global connectivity fosters fresh associations and novel insights. One might feel “one with nature” because the neurological scaffolding that enforces division between self and other loosens. This is not just poetic language...it is a neurological reality. And yet, the experience itself escapes reduction, hovering at the threshold of language and thought, inviting one to sit with the mystery of what is always present but often unrecognized.
On the practical side, Stealing Fire by Steven Kotler (paid link) is something many people swear by.
Consciousness does not arrive; it remains when the rest fades away.
This neurological symphony extends beyond the DMN. Emotional centers, such as the hippocampus and amygdala, often show increased activity, resonating with the intense feelings of awe, wonder, or deep peace that accompany mystical states. The prefrontal cortex, associated with executive functioning and self-control, also shifts its activity patterns, loosening the grip of linear, goal-oriented thinking and opening channels to more intuitive knowing. The brain moves from a self-referential mode, bound by past and future, to a spacious present awareness unencumbered by habitual filters (as noted by an intermittent fasting tracker (paid link)). Think about that for a second. What if the mind’s usual frame is not a prison but a construct that can be gently set aside, revealing the vastness always beneath?
The Psychedelic Lens: Accelerating the Inner Journey
Mystical experiences can arise spontaneously...sometimes in deep meditative absorption, near-death, or moments of intense crisis...but psychedelic substances have emerged as reliable doorways to these states in carefully controlled environments. Indigenous cultures have long honored plants like psilocybin mushrooms, ayahuasca, and the DMT-containing chacruna for their ability to kick off healing and spiritual insight. What modern science brings to the table is a translation of these ancient practices into the language of neurochemistry and receptor activity. These compounds primarily act as agonists to serotonin receptors, particularly the 5-HT2A receptor, modulating the flow of neurotransmitters and reshaping the mind’s scene in ways that allow ordinary perception to dissolve and new patterns to emerge.
Bear with me on this one. Psychedelics do not simply produce hallucinations or chimera; they guide the brain into states where the familiar architecture of self is temporarily dismantled. This dissolution of egoic boundaries parallels the quieting of the DMN, but it also sparks an increase in entropy within the brain’s network, a kind of organized chaos that opens pathways for new neural connections. The experience...often described as ineffable...can include feelings of deep interconnectedness, encounters with seemingly timeless truths, and a release from self-imposed limitations. These states have been shown to reduce symptoms of depression, anxiety, and addiction, suggesting that the brain’s ability to rearrange its maps of self and reality holds immense therapeutic potential.
Interestingly, such experiences also highlight the paradox of control and surrender. The prefrontal cortex, usually the brain’s captain steering the ship of thoughts and decisions, momentarily relaxes its grip, allowing a wider field of awareness to emerge...one unfiltered by the usual self-referential loops. This moment of surrender paradoxically opens the possibility for new forms of agency, born from a deeper recognition of interconnectedness and impermanence. I find it curious how something as intangible as a shift in awareness can ripple outward and reshape one’s engagement with the world, weaving new threads into the fabric of life.
When Science Meets the Mystery of Being
The encounter between rigorous neuroscience and the elusive qualities of mystical experience invites a dance between knowing and unknowing. Science, with its tools and measurements, can illuminate patterns, map neural activity, and correlate subjective reports with biological data. Yet, the essence of these experiences, the spaciousness beyond thought and form...the silent witness, the unspoken...remains elusive. It is not something to be grasped, but something that reveals itself when one stops chasing.
Across Buddhist teachings, Taoist wisdom, and Vedantic insights, consciousness is described as the space in which phenomena arise and dissolve, the constant behind change. Neuroscience now suggests that when the usual mental chatter...the self-referential narrative...softens, this space becomes palpable in lived experience. What is left is not void but fullness, not absence but presence. The brain’s shifting activity patterns are not the cause of this presence but the conditions in which it can be sensed more clearly.
So, what does this mean for our understanding of self and reality? Might the so-called mystical be the recognition of what’s always been here, beneath the surface of our conditioned minds? And if so, could science and spirituality not be adversaries but partners in illuminating the dimensions of awareness that elude ordinary perception? What new landscapes of consciousness might open when we hold these perspectives side by side, embracing their seeming contradictions as invitations rather than obstacles?
