A MANUAL · COMING SOON
The Operating Manual for Being Human
A field reference for living on this planet
Mark Feinberg
Most of us are doing this without instructions.
You showed up to a planet you didn't pick, inside a body you didn't design, running a brain already shaped by people whose choices you'll spend decades untangling. Nobody handed you a manual. So you worked it out as you went, and mostly it held.
And then somewhere along the way it stopped holding quite so well, and you couldn't say exactly why.
Maybe the problem isn't that you failed at being human. Maybe nobody ever explained how complicated being one actually is.
This manual is for the parts no one taught you.
- The patterns you repeat.
- The relationships that confuse you.
- The grief that sits in waves.
- The person you used to be.
- The person you're becoming.
A few pages, as they will read.
Your circadian clock runs on sky light. Your nervous system downregulates in response to natural soundscapes, birdsong, moving water, wind through leaves, in ways it doesn't respond to silence or urban noise.
You were built for an environment you no longer live in, and the mismatch isn't just conceptual. It's measurable.
MaryCarol Hunter° at the University of Michigan established a minimum effective dose: twenty minutes in a natural environment is enough to lower cortisol measurably. Not a hike. Not an expedition. Twenty minutes on a park bench near a tree.
There's something almost embarrassing about how simple this is. The most sophisticated nervous system on the planet, running the most complex chemistry in the known universe, and what it needs to function properly is sunlight in the morning, darkness at night, sleep it doesn't have to earn, breaks it doesn't have to justify, and twenty minutes near a tree.
That's the prescription. Not a supplement, not an app, not a protocol.
The system wants to sync. It's waiting for consistent inputs. Your job isn't to optimize it. Your job is to stop interfering with it.
Pushing through is what you do when you don't know there's another option. Now you know.
Maybe you're not burned out. Maybe you're out of rhythm. And rhythm, unlike damage, can be restored.

I'm Mark.
I built a career out of keeping it moving. Decades of performance. Decades of solving, achieving, producing. And underneath all of it, a quiet certainty that if I ever stopped moving, whatever I'd been outrunning would catch me.
I have often been more comfortable one-on-one than in groups. In a room full of people, part of my attention can leave the conversation and turn toward me. How am I coming across? Do I belong here? Does everyone else know how to do this in a way I somehow missed?
For years I thought belonging would arrive when I became confident enough, successful enough, interesting enough, something enough.
From the outside I looked like I had it handled. I worked at big companies, then built my own. Bought them, sold them, raised money, sat in boardrooms. I could walk into a business that wasn't working and find the problem, usually fast. People asked me to do that for them.
I could explain a company's cash flow. I couldn't explain why my chest was tight.
For most of my thirties I was convinced something was wrong with me. Not dramatically wrong. Not the kind of wrong that gets a diagnosis or earns anybody's sympathy. Just a low hum of not-okay sitting underneath everything. I could close a deal, run a meeting, make people laugh at dinner. And then I'd be alone, the performance would stop, and there'd be this weight I couldn't account for.
I thought everyone else had figured something out that I'd missed.
That's the part I want to say plainly, because I think a lot of people are carrying it. Not a crisis. Just the sense that there's an instruction sheet somewhere and you were out of the room when they handed it out. So you watch how other people do it, and you copy the shape of it, and you hope nobody looks too closely.
So I went looking. Books, papers, therapists, courses, teachers, anything. I read the way people read when they're trying to solve themselves. I learned a lot. Some of it helped. Most of it explained beautifully what was happening and then stopped right where I needed it to keep going.
After my marriage ended, I went years without letting anyone regulate me. I didn't use that language. I just said I was fine. I was handling it. I didn't need anyone.
Then on October 8, 2021, my closest friend Jonathan and his daughter were killed in a plane crash. He was my business partner. I talked to him almost every day. He was one of the few people I never had to explain myself to, and there aren't many of those in a life.
My body knew before my mind did. For weeks my hand kept moving toward my phone to call him. Not as a figure of speech. My hand would actually move.
Six months after Jonathan died, I drove to a Buddhist monastery in Mississippi. I didn't go looking for answers. I went because I'd exhausted every other option and I needed to be somewhere that didn't ask anything of me. I sat in the meditation hall and didn't meditate. I just sat.
A doctor later told me my cortisol was consistent with someone in a combat zone. I wasn't in a combat zone. I was running a business and grieving. My body couldn't tell the difference. I got sick constantly. My memory got bad enough that I started forgetting conversations I'd had that week.
What I remember most clearly is a panic episode in a parking lot. I got out of the car, put my feet on the asphalt, started naming cars by color, put my hand on my chest. About four minutes. I had no idea what I was doing. I found out later that every piece of it has a name and works for a reason.
That's when the reading stopped being interesting and got urgent. I wasn't curious anymore. I needed it.
One of the stranger parts of becoming a father was discovering how often parenting my son brought me face to face with the child I had been. I wanted him to know his feelings were allowed. Then I would hear myself react too sharply to something small. And sometimes, underneath my own voice, I could hear an older voice.
My son does not need a father with no wounds. He needs a father willing to notice when an old wound is speaking and come back.
A manual you keep where you can see it.




The twenty units
- 01Welcome to Being Human
- 02Trauma: The Ghost in the Machine
- 03The Canyon in Your Head
- 04The Chemistry of Being Human
- 05The Nerve Nobody Told You About
- 06The Clock You Forgot You're Running On
- 07The Attention You Lost
- 08Attachment: Why You Love the Way You Do
- 09Grief & Loss
- 10Boundaries
- 11Connection & Belonging
- 12Coming Home to Your Body
- 13Joy, Play & Pleasure
- 14Purpose, Work & Creativity
- 15The Self You Built to Survive
- 16The Space Between Selves
- 17Fear, Control & Uncertainty
- 18Surrendering to the Unknown
- 19Living With What You Know
- 20There Is No Finish Line
And then, a place to go deeper.

The practices
Every unit ends with something to do. When you're actually in it, the part of you that reads instructions is the part that has gone offline. So they're spoken, in Mark's voice, and the screen goes dark while one is playing.
The community
The book says plainly that nobody does this alone. But a forum about grief and trauma is a bad idea, and most of them prove it.
You see where other readers stopped. Not what they highlighted. Where they put the book down.
Going deeper on any page
Go Deeper Online
This section is just the map.
The full terrain is online.
- Extended science and evidence
- Author reflections and stories
- Guided practices and exercises
- Worksheets and tools
- Animated drawings and interactions
- Updates as the science evolves
In the printed book, selected drawings carry a GO DEEPER mark and a code. Scanning it opens the same material: expanded science, author reflections, guided practices, worksheets, and updates as the research moves.
Know when it's out.
Occasional notes on how it's coming along. Nothing else, and not often.
