The reducing valve has been filtering your reality since the moment you were born.
Henri Bergson proposed it in 1896 — not as metaphor, but as mechanism. The brain’s function is not to produce consciousness. It is to reduce it. To compress the full spectrum of what is real into a narrow band of what is useful for survival. The rest gets cut.
📺 Now With Video
Huxley and the reducing valve — 1953
In the spring of 1953, Aldous Huxley took four-tenths of a gram of mescaline under medical supervision in a Los Angeles living room. He had spent forty years writing about consciousness. He had no idea what was about to happen.
What happened was this: he looked at three flowers in a vase and saw what Mahākāśyapa saw when the Buddha held up a lotus on Vulture Peak.
The tathatā. The suchness. The bare reality of things before the mind’s reducing valve filters it back into the ordinary.
Bergson’s metaphor became, for one afternoon in California, direct experience. Huxley described it in The Doors of Perception — published the following year — as seeing the Istigkeit, the Is-ness, the quiddity of each thing, without category, without utility, without the reducing valve running its usual compression.
He was not having hallucinations. He was seeing what was already there.
Carhart-Harris and the reducing valve — 2014
Sixty years later, Robin Carhart-Harris’s team at Imperial College London put subjects into a brain scanner, administered psilocybin, and measured what Bergson described and Huxley experienced.
What they found: the default mode network — the brain’s centralised self-referential hub, the orchestrator of ordinary waking consciousness — went quiet. And across the cortex, long-range connections that are normally suppressed came alive. Brain regions that don’t usually communicate directly began talking to each other.
The reducing valve, measured for the first time. Not metaphor. Neuroimaging.
Three descriptions of the same mechanism: a philosopher in 1896, a novelist in 1953, a neuroscientist in 2014. One mechanism. Different instruments pointing at the same thing.
The reducing valve and the Tibetan tradition
There is a fourth description. It does not fit neatly into any of the above timelines because it precedes all of them by a thousand years.
The Tibetan Buddhist tradition did not describe the reducing valve from the outside. It built a systematic curriculum for dissolving it from the inside — not through a substance, but through the cultivation of attention so refined that the valve’s filtering operation becomes visible, and then optional.
Mahākāśyapa understood this when the Buddha held up the flower. Not because he was chemically altered. Because his attention had been trained to the point where the reducing valve’s operation was no longer automatic.
That question — how they did it, what the curriculum actually looks like at the level of practice — is where Part 2 begins.
FULL TRANSCRIPT
Prefer to read? The full transcript is available below. But I recommend listening first – my delivery adds context that’s hard to capture in text.
[GONG]
[OM CHANTING IN]
COLD OPEN
Los Angeles. May 1953.
A man sits in his living room.
He is one of the most intellectually formidable human beings alive — the author of Brave New World, a man who has read everything, thought about everything, written about everything.
He has spent his entire career mapping the human condition from the outside.
Today he is going inside.
His friend — a British psychiatrist named Humphry Osmond — dissolves four-tenths of a gram of mescaline in a glass of water.
Huxley drinks it.
They sit.
They wait.
Ninety minutes later, Huxley looks at a small glass vase on the table. It contains three flowers. 01:00
A rose. A carnation. An iris.
He stops talking mid-sentence.
What he sees in the next few moments will occupy the rest of his life.
Because what he sees is not a hallucination. What he sees is more real than anything he has seen before.
The flowers are not beautiful.
They are not symbolic.
They are not reminding him of anything.
They simply — are. 01:
With a completeness and a vividness and a sheer undeniable thereness — a suchness — that ordinary consciousness had never once allowed him.
He is seeing what the flowers actually are.
For the first time in his life.
By the end of this episode, we will explore this strange territory and discover why it does not lead to enlightenment on its own — and how you can open the same valve yourself, with your mind only.
[MUSIC FADES] 02:05
Welcome back to Quantum Awareness — Sound is Emptiness, Emptiness is Sound. I’m QP, your Quantum Preceptor.
EARLY CTA — THE FILTER
Before we begin — if these conversations are getting through your filter — and if you’ve listened this far, they clearly are — please subscribe, like, and share with one person who might be ready to hear it. The algorithm is its own reducing valve and your engagement is genuinely how we open it. I would really like to hit 500 subscribers. Every single one of you got us here so far, I’m very grateful.
SECTION 1: THE MAN IN THE ROOM 02:40
So in this podcast series we have been discussing consciousness from many different perspectives. Now I can no longer avoid it. We have to address the elephant in the room — the elephant so many began to experiment with in the 1950s.
The molecule. Or more accurately — the molecules.
No conversation about consciousness would be complete without it.
Who was Aldous Huxley and why does it matter that it was him? 03:11
First thing. This is not a counterculture experiment.
This is not Timothy Leary at a party.
This is one of the most rigorously educated minds of the twentieth century sitting down with a substance and a scientist to ask the philosophical question.
The question was simple: is ordinary waking consciousness the only form of consciousness available to a human being?
If you have been listening to any of my other episodes — you already know the answer.
No. It is not. 03:44
Aldous Huxley was born in 1894.
His grandfather was T.H. Huxley — the man who fought Darwin’s battles, the greatest scientific communicator of the Victorian era.
Aldous grew up surrounded by the greatest minds in Britain.
He lost most of his eyesight as a teenager and spent years in near-blindness — which perhaps trained a quality of inner attention that his contemporaries never developed.
He became a novelist, an essayist, a philosopher.
He wrote Brave New World in 1932 — one of the most prescient books of the century.
He wrote The Perennial Philosophy in 1945 — a masterwork of comparative mysticism showing that beneath the surface differences of the world’s spiritual traditions, the same essential recognition was being pointed at.
He had spent thirty years mapping the territory of consciousness from the outside.
From the library.
From the page. 04:45
In 1953 — he decided to go there.
And the man who went with him — Humphry Osmond — was not a drug dealer or a provocateur.
He was a serious British psychiatrist who had been researching mescaline’s therapeutic potential and who coined a word for these substances that we still use today.
Psychedelic. From the Greek — psyche, mind, and delos, manifest.
Not mind-distorting.
Not mind-destroying.
Mind-manifesting. 05:18
What the mind contains but cannot ordinarily access — made manifest.
Every human culture in history has understood this.
Has found a way to open the valve — in ceremony, in ritual, in the sanctioned temporary dissolution of the ordinary self.
Modern Western society forgot. Huxley was trying to remember.
SECTION 2: THE FLOWER SERMON AND THE FLOWERS 05:44
Twenty-five centuries before Huxley sat down in that Los Angeles living room, a man sat with his assembly on Vulture Peak in India.
Everyone was waiting for the teaching.
The words.
The doctrine.
The map.
The Buddha said nothing.
He picked up a single lotus flower and turned it in his fingers.
The entire assembly sat in confused silence.
Only one person smiled.
Mahākāśyapa. (mah-HAH-KAH-shya-pah)
A smile of direct recognition — not intellectual, not conceptual — the smile of someone who in that moment saw the flower as it actually was.
The tathatā (TAH-tah-TAH) of it.
The suchness. 06:33
The bare undeniable is-ness of a lotus being a lotus with nothing added and nothing taken away.
The Buddha said: this — this that cannot be spoken — is the transmission.
The whole of Zen flows from that smile.
Now — 1953. Los Angeles.
Huxley looks at the rose, the carnation, the iris.
And something happens that he spends the next year trying to put into words knowing the whole time that words cannot reach it.07:10
He writes afterward that he was seeing what Adam saw on the morning of his creation. The miracle of naked existence.
Not flowers he liked or flowers that reminded him of anything.
Just flowers being flowers with a completeness that ordinary consciousness had never once permitted.
In Sanskrit: tathatā. (TAH-tah-TAH) Suchness. The bare reality of a thing before the mind labels it, categorises it, relates it to everything else, files it away, moves on.
In Tibetan Buddhist epistemology this is pratyakṣa (prat-YAKH-sha) — direct perception. 07:50
The bare sensory event before anumāna (ah-noo-MAH-nah) — conceptualisation, inference — floods in and replaces the experience with a representation of the experience.
Ordinary consciousness barely touches pratyakṣa (prat-YAKH-sha) before anumāna (ah-noo-MAH-nah) slams the door shut.
You see a flower for a fraction of a second and then you see your idea of a flower.
Your category.
Your memory.
Your association.
Your JUDGEMENTS OF THE FLOWER.
The flower itself — the actual flower, the tathatā (TAH-tah-TAH) its suchness— is long gone before you ever really had it. 08:35
This is what is meant when we say be here and now!
Mahākāśyapa’s (mah-HAH-KAH-shya-pah) smile said: I see it.
Huxley’s mescaline held the door open long enough for him to see it too.
The same territory. Twenty-five centuries apart.
One got there through a lifetime of practice. One got there through four-tenths of a gram dissolved in water.
And the question hanging over both — the question this episode is really about — is not whether the territory is real.
It is.
The question is what you do with it once you’ve seen it. 09:15
I want to tell you about two moments.
The first was in practice.
During a Diamond Mind retreat — deep in the sitting, nothing unusual about the session — I just started crying.
Not from sadness.
There was no story attached to it.
No memory, no grief, no object.
Just tears.
The kind that comes when something that has been held for a very long time is briefly released.
The valve opened a small amount and something that had been compressed behind it — something I didn’t even know was there — came through.
That is the kleśāvaraṇa (kleh-SHAH-vah-rah-nah) moving.
Not dramatically.
Quietly.
The way a knot loosens in warm water.
As the tears roled down my cheeks it was warm like a hug and calm like when you are told that its going to be ok.
The second was a few weeks ago.
I was with my therapist and I put something down.
Something I had been carrying for a long time.
Long enough that I had stopped noticing the weight of it.
It was not mine.
It was never mine. 10:35
Someone had given it to me — the way people give each other their pain when they don’t know what else to do with it — and I had accepted it.
More than accepted it.
I had made it my favourite pain.
The one I returned to. The one I knew how to carry.
I don’t have it anymore.
I left it in that room and I walked out and the air was different.
Not dramatically different.
Just — cleaner.
One less filter between me and whatever was actually there.
I told my therapist he needed to clean the chair I left it on after I left.
That is what the first veil dissolving actually feels like.
Not a blinding light.
Not a revelation.
Just — something that was always in the way is no longer there.
And you notice, almost with surprise, how much more of the signal is getting through.
And most importantly, how much closer you are to joy than you were to anger.
Huxley saw it in three flowers.
I felt it in tears with no story and a room I walked out of differently.
The territory is the same.
The valve is always available to open.
No molecule needed. 11:58
I hope this reaches you even if you have never heard of Huxley, never sat a retreat, never thought about the reducing valve.
Because everyone has a favourite pain they didn’t know wasn’t theirs. 12:11
Someone whose understanding of these things goes far beyond mine once wrote his Doctorate thesis on Aldous Huxley.
His conclusion: “The chemical can show you the door, but only you can go through it.”
“The entire counterculture of the 60s was trying to understand consciousness. Many of them moved on to harder, more addictive experiences. I tried to help some of them and I am sure I did. But many were convinced that enlightenment could come from a molecule. I knew they were wrong.
If you don’t know the door even exists, the molecule can help.
That’s where it ends. Most people end up burning all their fortunate karma up in a few evenings with nothing else to show for it.”
He paused.
“Only the Dharma — the four basic thoughts, the refuge, the Paramitas — can take you through the door and give you lasting change.”
Wow Nothing could be more clear to me than that.13:20
SECTION 3: THE REDUCING VALVE
Here is the concept that makes Huxley’s afternoon more than a beautiful story.
The philosopher Henri Bergson proposed in the early twentieth century that the brain is not a generator of consciousness.
It is a filter.
A reducer.
Its job is not to produce experience — it is to narrow experience. To take the vast field of what is available and compress it down to the thin beam that a biological organism needs to survive, navigate, function, reproduce.
Huxley took this and gave it a name.
The reducing valve.
The brain, he argued, is constantly filtering.
Constantly suppressing.
The full signal of reality — whatever that is, however vast it might be — is being narrowed through the valve of the nervous system into the manageable trickle we call ordinary waking awareness.
We think this trickle is the whole river.
We think this narrow beam is all there is.
The mescaline loosened the valve.
Not by adding anything. By removing the filter. 14:32
What came through was not a drug effect superimposed on reality. What came through was reality. The signal that was always there, always available, that the brain had been quietly, efficiently, comprehensively suppressing your entire life.
The flowers were always those flowers.
Huxley just finally got to see them. Really see them for the first time.
Now here is where the science catches up.15:00
We have talked in this series about the default mode network — the brain’s storytelling system, the thing that generates the running narrative of the I, the same system that powers down in deep meditation, that quiets in deep sleep, that LaBerge found temporarily suspended in lucid dreamers.
In 2014 Robin Carhart-Harris at Imperial College London showed that psychedelics work primarily by suppressing the default mode network.
His REBUS model — Relaxed Beliefs Under Psychedelics — showed that the brain is a prediction machine.
It constantly generates a top-down model of reality and filters incoming sensory information through that model.
What doesn’t fit the model gets suppressed. What confirms the model gets amplified.
Psychedelics relax the top-down predictions.
The bottom-up sensory information — the actual signal, the tathatā (TAH-tah-TAH) Suchness— gets through.
Carhart-Harris in 2014 was describing in neuroimaging what Bergson described philosophically in 1908 and what Huxley described experientially in 1953.
The reducing valve.
Three descriptions.
One mechanism. 16:20
PART 1 ENDING
So there we have it the end of Part one.
Philosophy. Experience. Neuroscience. Sixty years apart. The same reducing valve described from three completely different directions.
And here is what I want you to sit with before the next episode.
The Tibetan tradition had been working with this mechanism — through practice, through sustained inner investigation, without chemistry, without a laboratory — for a thousand years before any of them.
Not describing the valve from the outside.
Dissolving it from the inside.
How you ask? That is where we go next.
This is QP. Sound is emptiness. Emptiness is sound.
Catch you later you in Part 2.
Episode Runtime: Approximately 26 minutes of content
Further Reading:
Onsite:
EP13 — Tonight You Will Leave (Lucid Dreaming)
EP14 Part 2 — add when live
Online:
Wikipedia — The Doors of Perception
QP
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