A Deep Dive into the Materialist View of Mind, Brain, and Self
Have you ever had a “gut feeling” that turned out to be right? Ever felt your heart race before making a big decision? Ever wondered if there’s more to you than just your physical brain?
These experiences are universal. For millennia, they were explained with one word: soul. That invisible essence that makes you you. The ghost in the machine.
But here’s what’s fascinating: after centuries of scientific investigation, after fMRI scans and electrophysiology studies and quantum mechanics, researchers have found something remarkable. There is zero empirical evidence that requires the existence of an immaterial soul to explain any function of the brain or body.
This isn’t a claim of atheism or materialism for its own sake. It’s a statement about the evidence. Let me walk you through what scientists have actually discovered about consciousness, the brain, and the nature of human experience.
Part One: The Heart’s “Mini-Brain” and What It Actually Does
Let’s start with something you’ve probably heard: the idea that the heart has its own “brain.” It sounds mystical, almost poetic. Your heart knows things. Your heart guides you.
Here’s what the science actually says.
The heart does have a sophisticated network of neurons—about 40,000 to 100,000 nerve cells organized in ganglia. Scientists call this the intrinsic cardiac nervous system (ICNS) . And yes, it’s sometimes metaphorically called a “heart brain” in popular articles .
But calling it a “brain” is misleading in ways that matter.
What the ICNS actually is:
- A neural network that helps coordinate heartbeat
- Can process some information locally
- Acts as a relay station between the heart and actual brain
- Controls rhythm adjustments beat-by-beat
What it is NOT:
- A brain (which has roughly 86 billion neurons)
- Capable of thought, memory, or consciousness
- Independent decision-making in a cognitive sense
- Self-aware or sentient
Think of it more like the heart has its own local control system—similar to how your gut has a complex nervous system (the enteric nervous system) that controls digestion without needing constant brain input. It’s elegant engineering, not evidence of a second mind.
And here’s the crucial part: scientists have tested this system extensively. They’ve placed tiny electrodes on these heart neurons. They’ve measured their firing patterns. They’ve tracked their chemical signals. And what they find is that the heart’s neural network reacts in ways that are 100% consistent with physical and chemical laws .
So when you feel your heart “react” before your brain consciously registers something? That’s not your heart thinking. That’s a fast, automatic reflex—like your knee jerking before you consciously feel the tap. The heart’s local control system handles immediate needs, and the signal reaches your conscious brain a split second later .
Part Two: The Subconscious Mind—What Scientists Actually Study
Speaking of things happening outside conscious awareness: let’s talk about the “subconscious mind.”
You’ll hear this term everywhere in self-help and popular psychology. But here’s something surprising: most neuroscientists and psychologists don’t actually use the term “subconscious” in their professional work .
The preferred term is “unconscious processes” or “nonconscious processing.” And the difference matters.
| Term | Who Uses It | What It Actually Means |
|---|---|---|
| Unconscious | Neuroscientists, Harvard Health, psychoanalysts | Mental processes and content outside conscious awareness; neural activity you can’t access |
| Subconscious | Popular psychology, self-help | Information “just below” awareness; considered vague by scientists |
| Nonconscious | Cognitive neuroscientists | Neural processing that never reaches conscious awareness at all |
Here’s what research has actually discovered about these processes:
It’s physically localized in the brain. A 2019 study using fMRI imaging identified the specific brain regions that remain active during subliminal (unconscious) perception . Just three areas lit up:
- The fusiform gyrus (involved in high-level visual processing)
- The precentral gyrus (involved in motor preparation)
Researchers called this the “core” of the conscious network—the foundation upon which awareness is built .
It handles most of your brain’s work. Estimates suggest unconscious processing accounts for roughly 95% of brain activity . Your conscious mind handles about 40-50 bits of information per second. Unconscious processes handle about 11 million bits per second .
It has specific, predictable characteristics:
- Automaticity: Learned skills become automatic (driving a familiar route while thinking about something else)
- Habit formation: Repeated actions encode in neural pathways
- Emotional signaling: Communicates through feelings and body sensations
- Pattern recognition: Quickly identifies associations from past experience
Notice what’s missing from that list? Any evidence of a separate “mind” or non-physical entity. These are all physical processes—patterns of neural activity that can be measured, studied, and understood.
Part Three: The “Hard Problem” of Consciousness
Now we get to the really interesting question: if everything is physical, why is there experience at all? Why is there “something it is like” to be you?
This is what philosopher David Chalmers called the “hard problem of consciousness.” And it’s where science meets its deepest mystery.
Scientists don’t pretend to have this fully solved. What they have is something more valuable: a rigorous framework for studying the question.
When a neuroscientist studies consciousness, they’re studying awareness—the state or quality of being conscious of something . And they’ve discovered quite a lot:
Awareness is not instantaneous. There’s a measurable time delay between a stimulus hitting your senses and you becoming consciously aware of it. Experiments show this “utilization time” can be 300-500 milliseconds . Your brain processes information unconsciously before it “broadcasts” it to your awareness.
Awareness has neural correlates (NCCs). Specific patterns of brain activity are consistently associated with conscious awareness. A stimulus you’re aware of triggers a late, synchronized burst of activity across distributed networks. An unseen stimulus doesn’t .
Awareness is not localized in one spot. It’s an emergent property of complex interactions between multiple brain networks . Not a single area, but dynamic communication between them.
Several major theories compete to explain how this happens:
| Theory | Core Idea |
|---|---|
| Global Neuronal Workspace Theory (GNWT) | Consciousness is what happens when information is “broadcast” globally to widespread networks, making it accessible to many cognitive systems |
| Integrated Information Theory (IIT) | Consciousness corresponds to a system’s capacity to integrate information; greater integration means greater consciousness |
| Higher-Order Theories (HOT) | A mental state becomes conscious only when you have a higher-order thought about that state |
| Recurrent Processing Theory (RPT) | Consciousness depends on feedback loops of processing, not just feedforward signals |
These aren’t just philosophical musings. They make testable predictions. A landmark “adversarial collaboration” in 2025 pitted GNWT against IIT . The results were inconclusive—each theory found support for some predictions but faced challenges from the data.
This is what good science looks like: active debate, rigorous testing, and no premature conclusions.
Part Four: Energy Healing and the Problem of “Scientific-Sounding” Language
This brings us to something you see everywhere: people using scientific words to describe non-scientific concepts.
Take Jeffrey Allen, a former software engineer who now identifies as an “energy healer.” He talks extensively about “energy”—vibrations, shifts, healing frequencies.
Here’s the thing: he’s not talking about the same energy that physicists study.
| Jeffrey Allen’s “Energy” | Scientific “Energy” |
|---|---|
| A non-physical life force, vibration, or consciousness | The capacity to do work or produce heat |
| Can be felt, manipulated, and healed | Measurable in joules, watts, calories |
| “Spirit Mind” vs. “Material Mind” | Governed by conservation laws, thermodynamics |
| Accessed through meditation and intuition | Measured with instruments, used in engineering |
| Claims are not empirically testable | Claims are testable and falsifiable |
They’re entirely different concepts sharing the same word. And from a scientific standpoint, Allen’s “energy” has no empirical evidence supporting it. No instrument can detect it. No experiment has confirmed it. It’s a metaphysical concept dressed in scientific clothing.
Does this mean people who practice energy healing are frauds? Not necessarily. The benefits people report—reduced stress, greater well-being, a sense of connection—are real psychological effects. Meditation and positive thinking have measurable impacts on the brain. But the proposed mechanism (“energy healing”) isn’t supported by evidence .
As we’ve said before: the benefits are real. The explanation is unsupported.
Part Five: Putting It All Together—The Materialist View
So where does this leave us?
Based on everything we’ve observed, measured, and tested across neuroscience, biology, physics, and chemistry, here’s what the evidence supports:
1. Every mental process has a physical correlate. Thoughts, emotions, memories, decisions—every single one corresponds to measurable brain activity. Change the brain physically (with drugs, injury, disease, or stimulation) and you change the mind. This relationship is absolute and predictable.
2. No “ghost in the machine” is needed. Processes once attributed to mysterious life forces—heartbeats, digestion, reflexes, even thought itself—have been progressively explained by physical mechanisms. We don’t need a soul to make the heart beat; we have the sinoatrial node. We don’t need a soul to feel fear; we have the amygdala and cortisol.
3. The laws of physics hold. The conservation of matter and energy is fundamental. If an immaterial soul were to interact with the physical brain, it would have to inject energy or information into the system—a detectable violation of physical law. No such violation has ever been observed.
4. Occam’s razor applies. The materialist explanation (the brain produces the mind) explains all the data. The dualist explanation (the brain is a receiver for a soul) adds an unnecessary, unproven entity.
This doesn’t mean scientists claim to have disproven the soul. Science studies the natural world; it’s not equipped to make claims about the supernatural. The more accurate statement is:
“The soul is an unnecessary hypothesis. We have a complete and working model of the mind and body based entirely on physical processes, and not a single piece of empirical data requires us to look beyond that model.”
Part Six: What This Means for You
You might be wondering: if this is all just physical processes, does it make life less meaningful? Less magical?
I’d argue the opposite.
Understanding that consciousness emerges from physical processes doesn’t diminish its wonder—it deepens it. That 86 billion neurons, each one a complex cell, can work together to produce love, art, mathematics, and self-awareness? That’s not reductionism. That’s awe.
That your “gut feelings” are your brain processing patterns too quickly for conscious awareness? That’s not removing intuition—it’s explaining how it works.
That your habits are encoded in neural pathways you can actually change? That’s not determinism—that’s showing you how to change.
The materialist view doesn’t take away your humanity. It reveals the extraordinary machinery behind it.
A Final Note on Language and Precision
Throughout this article, I’ve been careful with terms. That’s not pedantry—it matters.
“The heart has a mini-brain” is a catchy phrase. But it misleads people into thinking the heart thinks.
“Subconscious mind” sounds intuitive. But it makes people imagine a second self living inside them.
“Energy healing” sounds scientific. But it borrows credibility from physics without earning it.
The words we use shape how we think. And when it comes to understanding ourselves, precision matters.
Your brain is extraordinary. Your body is extraordinary. The processes that create your experience of being alive are extraordinary. They don’t need to be anything other than what they are to be worthy of wonder.
Have thoughts on this? Disagree strongly? Want to share your own experience? The comments are open. I read every response.