The title of this series of posts is both a declaration (the mind is not contained exclusively within the brain) and an invitation – to think creatively about the nature of your mind. You no longer have to imprison your mind inside your skull, or anywhere else in the body, in fact. There are other ways to imagine and experience it. We’ve provided many clues that mind extends outside the body, which implies that your own mind, as you experience it, may exist without boundaries. As we demonstrated, contemplative practitioners in many traditions point to experiences of mind that extend beyond the body, to encompass the universe as a whole.

Your brain doesn’t determine your mind. Brain and mind are recreating each other with every act of perception. Moreover, with training, you can learn to experience your mind in parts of your body beyond the enclosure inside your skull, perhaps experiencing it even as filling your body. We’ve been offering factual evidence to avoid the trap of metaphysics or unfounded speculation, since science so deeply distrusts metaphysics. Has the evidence made you curious about what your mind really is? There’s a huge difference between two pictures of reality. One picture describes a clockwork brain that evolved mechanistically from a random universe. The other describes a conscious universe where one expression is the human mind.

If you accept the second story – as we do – it leads to a mind-blowing conclusion: the universe is thinking, feeling, and acting through you. You exist so that the universe has a new outlet for knowing itself. (Surely this makes you curious!) As was said by the Sufi master Hazrat Inayat Khan, “The Sufi says this whole universe was made in order that God might know Himself. The seed wished to realize what it is, what is in it, and therefore became the tree.”

If you and I are embedded in a conscious universe, a leap toward freedom can be made. Unfortunately, most people use their brains in a habitual way. Day in and day out, the brain repeats the same patterns of habitual ideas (someone once estimated that 90% of the thoughts we have today are repetitions of the thoughts we had yesterday). Habitual ideas are imprinted in you by prevailing cultural assumptions, including those that derive from science and its purely materialist view of the world. If you are a materialist, the universe couldn’t possibly be thinking (not that this notion bothers the universe – it has time to wait until a better belief system comes along).

We do not seek to convince you of anything in these posts but to stir up the urge to seek your own answers. For example, do you accept that your mind works like a computer, which would make the brain a kind of biological hardware (what one expert in artificial intelligence dubbed “a computer made of meat”)? The brain-as-computer idea can be exploded by asking, has a computer ever been curious? Has a computer ever been in love? Has it ever had urges or given into temptation? These aspects of mind are innate in human beings and are not computational.

Now that you are thinking outside the (skull) box, what if we can expand your sense of self beyond your skin? When you say “my body,” you probably mean this body made of approximately 4 trillion human cells, each of which contains your genes. But is that really your body? On close inspection, your body is lined, over the surface of the skin and throughout the digestive tract by 100 times as many cells, if not more, that aren’t “yours” at all, in that they do not contain your ancestral genes. They are microbial cells, part of what scientists now refer to as the microbiome – your second genome, so to speak. These include both bacteria and other single- celled creatures known as archaea. You are, in essence, composed of colonies of human and non-human cells living in harmonious balance.

Outnumbering “your” cells by a hundred to, these micro-organisms aren’t just passive riders or conveyers of disease. Quite the contrary- these trillions of bacteria convey your health. For example, if we grow mice in an “abiotic” environment in which there are no bacteria (or if we have a boy who has to be raised in a bubble because he has a rare disorder, Severe Combined Immunodeficiency syndrome, and cannot control infections), the digestive tract can’t function properly. The microscopic, finger-like projections, or microvilli, that line the intestinal wall don’t form. Without them, you don’t have enough gut surface area to accomplish the digestion and absorption of nutrition. By adding back in the helpful bacteria that normally line the intestines, the microvilli arise.

So your genome – the sum total of your genetic inheritance – is not sufficient to code for the entire structure of your digestive tract. You are alive because of your connection to the outside world; indeed, there is no boundary between you and the outside world’s abundance of life.

This realization changes the picture of genes, too. They code for your cells, tissues, and organs; moreover, genes code for the interactions between your cells and the neighboring bacteria, with biomolecules being passed back and forth. The biochemistry of digestion is a shared project between your body and bacteria, a basic fact acknowledged for decades, but by implication, without bacteria there can be no you. This observation can be extended in every direction. Without trees breathing in carbon dioxide and exhaling oxygen, you couldn’t breathe – the forests are part of your lungs. Without viruses constantly mutating, you would have many fewer antibodies – every virus is part of your immune system. The rivers that circulate fresh water are part of your bloodstream. These connections aren’t incidental. Your body is the world, and by extension, so is your brain, since you share with the world every molecule, chemical reaction, and electrical impulse that constitutes the brain.

It makes people woozy to accept that there is no boundary between “me” and the whole world. What about the skin? It is portrayed in high school biology class as an impermeable barrier protecting you from invaders assaulting the body from “out there.” But the metaphor of the skin as living armor isn’t viable. Pause and move your hand, observing how the wrist and finger joints move under the skin. Why doesn’t the skin break down with all this motion, the push and pull of your fingers closing and extending, your arm bending and stretching? Because the bacteria lining the creases in your skin digest the cell membranes of dying skin cells and produce lanolin, which lubricates the skin. How long would “you” and your genome last if your skin were cracking, open to infection just from typing on a laptop or waving goodbye to someone?
What is your body now? It’s no longer just a human body. It’s a community of single cell organisms that function harmoniously together (in times of good health) organizing themselves into tissues and organs. Such astonishingly complex cooperation implies a host of surprising things:

Your genes are siblings of bacterial genes.
The evolution of bacteria is actually human evolution at the same time.

One intelligence binds micro-organisms and “higher” life forms. There is no sharp dividing line between “smart” creatures and the “dumb” micro-organisms that evolved alongside them.

A skeptic may protest that we’ve used physical evidence to support a theory of mind. But science does the same thing all the time. By equating mind and brain, neuroscience has backed itself into a corner, forced to explain thoughts by looking at the interaction of molecules. In the final post of this series, we’ll get out of that corner by putting mind first and brain second. That way, we solve the problem of how molecules of hydrogen, oxygen, and carbon – the majority of “stuff” in the brain – learned to think. The obvious answer is that they didn’t. We think because we are expressions of the mind, not robots being operated by the brain.

(To be cont.)

Deepak Chopra, MD is the author of more than 75 books translated into over 35 languages with over twenty New York Times bestsellers. Chopra serves as Founder of The Chopra Foundation.

Menas Kafatos, Ph.D., Fletcher Jones Endowed Professor in Computational Physics, Director of the Center of Excellence at Chapman University, co-author with Deepak Chopra of the forthcoming book, Who Made God and Other Cosmic Riddles. (Harmony)

P. Murali Doraiswamy, MBBS, FRCP, Professor of Psychiatry, Duke University Medical Center, Durham, North Carolina and a leading physician scientist in the area of mental health, cognitive neuroscience and mind-body medicine.

Rudolph E. Tanzi, Ph.D., Joseph P. and Rose F. Kennedy Professor of Neurology at Harvard University, and Director of the Genetics and Aging Research Unit at Massachusetts General Hospital (MGH), co-author with Deepak Chopra of Super Brain: Unleashing the Explosive Power of Your Mind to Maximize Health, Happiness, and Spiritual Well-being. (Harmony)

Neil Theise, MD, Professor, Pathology and Medicine, (Division of Digestive Diseases) and Director of the Liver and Stem Cell Research Laboratory, Beth Israel Medical Center – Mount Sinai School of Medicine, New York. www.neiltheise.com