Upgrading Your Brain
I first started wondering about the hidden mechanics of the mind when I was a teenager spending my nights in the pool halls of Beaver County, Pennsylvania. It was the early 1980s and my friends and I spent a lot of time there. Most nights were average but every once in a while something strange would happen. I would step up to the table and suddenly the geometry of the game just made sense. I would run most of my balls in 8-ball without pausing. It was like I was not even thinking. I was just doing and it felt incredible. If you asked me how I made a specific bank shot I could not tell you. The game just happened.
Years later I realized I was not just having a lucky night. I was stumbling into a biological reality that neuroscientists have spent decades trying to map.
I experienced this again years later during a very different phase of my life. After my third startup I started coding heavily to build pet projects. I would be trying to understand how to build a complex component of a system and I would get lost in the code. The hours would vanish. The solution would pour out of me with the same automatic fluidity as those pool shots back in Pennsylvania.
Scientists call this the flow state but that term is too soft for what is actually happening. When you enter that zone you are fundamentally altering the function of your brain.
Research shows that when an expert engages in a task they know deeply, a fascinating shift occurs. The dorsolateral prefrontal cortex is the region right behind your forehead that acts as your inner critic. It is responsible for monitoring your actions and generating doubt. When I was running that pool table or writing that code, this area of my brain effectively went offline.
Simultaneously the deeper and more primal parts of the brain responsible for instinct and automatic movement took over. This explains a frustration I had as a teenage musician. I played in a band and I could remember tons of songs effortlessly. The lyrics and chords were burned into my mind. Yet I had a incredibly hard time remembering algorithms in math class. I always thought there must be a way to make calculus easier if the formulas were songs but I never figured it out.
The science now tells us why. Musical memory relies on procedural memory and emotional encoding. It is a deep storage system for knowledge about how to do things. My brain had turned the songs into a physical habit like riding a bike. The math algorithms remained abstract concepts floating in my prefrontal cortex which is a much weaker and more energy expensive filing cabinet.
This process of moving a skill from the conscious mind to the automatic mind is called neuroplasticity. It is the reality that your brain is not static hardware. It is dynamic software that constantly rewrites its own code based on what you do.
Think of your brain like a dense forest. The first time you try a new skill it is like hacking a path through thick brambles with a machete. It is slow and exhausting. In neurological terms your brain is firing wildly while trying to connect the visual cortex to the motor cortex. But if you hack that same path tomorrow it gets a little easier. Do it a thousand times and the brambles disappear. Do it ten thousand times and the brain decides to pave the route.
Neuroplasticity is the process of turning dirt paths into massive highways. The brain physically reinforces the neural pathways used most often with a fatty substance called myelin. This substance acts like insulation on an electrical wire and makes the signal travel faster without losing information. Once that highway is built you no longer need the machete. You do not even need to think about the destination. You just get on the ramp and the rest is automatic.
This happens to fluent speakers of a second language as well. When you are learning you painfully translate every word in your head using the prefrontal cortex. When you are fluent the meaning just pours out of your mouth. The language has moved from an effortful activity to a procedural one. Driving, typing, and even the way you respond to an email all follow the same rules.
If you think this physical change is just a metaphor you should consider the taxi drivers of London. To earn their license they must pass a brutal exam known as The Knowledge. It requires the memorization of roughly 25,000 streets and thousands of landmarks. Scientists scanned the brains of these drivers and found that the successful ones physically grew the posterior hippocampus. This is the part of the brain responsible for spatial navigation. Their brains literally bulged to accommodate the data they forced into it.
To actually achieve this state requires a specific sequence of steps. You cannot simply decide to let go without doing the work first. The process begins with intense conscious focus where you force your prefrontal cortex to analyze every detail. This is the struggle phase I felt when learning a new codebase or practicing a new song. Next you must engage in deep repetition until the pattern moves from your conscious mind to your automatic memory systems. The final step is the hardest because you must actively stop trying to control the outcome. You have to trust the architectural work you have done and release the need for oversight.
Naturally people ask if there is a way to speed this up. This question has birthed a rapidly emerging field of neuroscience focused on psychoplastogens. These are substances like psychedelics or ketamine that are studied for their ability to promote structural plasticity. Current research suggests these compounds may help neurons grow new connections rapidly. We also see the rise of nootropics which use chemistry to artificially extend the struggle phase of learning.
But this brings me to the most important realization I have had since those days in the pool hall. Plasticity is value neutral. Your brain does not care if the path you are hacking through the forest is helpful like practicing code or destructive like endless worrying. It only cares about repetition.
If you use a chemical to open your mind and then spend six hours obsessing over a failure you are using a power tool to build a prison.
This danger is even more common with everyday substances. We all know people (or ourselves) who try to change their thought patterns by using alcohol or pot when they are stressed or angry. It feels like relief in the moment, but biologically they/we are digging a deep trench. They/we are teaching the brain that the only answer to negative emotion is intoxication. That is how addiction starts. You build a high-speed neural highway that connects "feeling bad" directly to "using a substance." And the tragedy is that the only way to fix it is to wreck those same highways. You have to go back into the forest with a machete and painfully carve out a new path of sobriety while the old, easy highway is right there waiting for you.
The musicians and the pool sharks and the coders are not magic. They are just highly specialized architectural projects. The lesson of neuroplasticity is one of profound responsibility. Every thought you repeat and every action you take is a vote for the kind of brain you will have in the future. You are building the infrastructure of your own mind right now. Be careful what you practice because you are getting better at it every day.
It amazes me that we don’t teach this in schools. We insist that teenagers learn how a combustion engine works or the geography of ancient Mesopotamia, yet we send them into the world with zero understanding of the machine inside their own heads. Most adults don’t realize that when they get angry, their limbic system can physically shut down their prefrontal cortex, making critical thinking impossible. They don’t see how social media is engineered to exploit their dopamine loops, or how easily confirmation bias can slide into cult like thinking. We understand the operating system of our iPhones better than the operating system of our own minds. If we gave our kids the manual. If they understood that their brain is a thing they can build, repair, and protect we would be living in a very different society.