Semi-controllable systems

Not all internal systems are equally available to us.

Most systems in the human body and mind fall into one of two categories: fully automatic, or fully controllable. Fully automatic systems include things like heartbeat, digestion, and hormonal rhythms. Systems under conscious control include skeletal muscle movement and actions like speaking or reaching.

A small set of systems sit in between. They run automatically, yet can be intentionally influenced. These are semi-controllable systems, and they are where human agency becomes most tangible.

Breath, attention, and beliefs are all automatic and influenceable. Because of this, they offer rare access points into the otherwise opaque processes of mind and body, like adjustable dials on systems most people experience as fixed.

The pattern of semi-controllable systems shows up across a wide range of human development practices, from contemplative traditions to modern therapeutic approaches. Not because those traditions are inherently similar, but because they converge on the same constraint: these are some of the few layers where intervention is actually possible. And unlike most biological and psychological systems, they can be felt directly and are always available.

There is something fundamental here about how internal change tends to occur. It is not primarily through what is fully automatic, where we can mostly only observe or tolerate. And it is not through what is fully voluntary, which we can control but which does not deeply shift internal processing on its own. It is through these intermediate systems — processes that usually run unconsciously, but can be brought into awareness and gradually shaped. Engaging these systems allows changes to carry through the wider system.

Breath is one of the most direct interfaces into the nervous system. It runs automatically, but can be consciously slowed, deepened, or patterned, providing a way to influence physiological state in real time. Box breathing, for example, is standard training in Special Operations forces as a tool for shifting the body from fight-or-flight toward calm under pressure. Rather than trying to think your way into a different state, breath allows you to work from the body upward.

Attention shapes what becomes experience. It is constantly moving, guided by stimulus and habit, but it can also be placed, held, and redirected. This makes it a primary lever for shaping perception: what we notice, what we amplify, and what we let pass. Performance psychologist Nate Zinsser, who trains athletes and military leaders at West Point, teaches a practice he calls “statements only.” Before any major performance, he advises that the mind be directed toward confident, grounded assertions and avoid drifting into evaluative questions (“What if…?”) about competence or readiness. The practice works not by suppressing doubt but by giving attention somewhere better to go.

Beliefs operate more subtly, shaping how experience is interpreted. Most beliefs form outside of conscious awareness, through conditioning and repeated experience. They tend to feel fixed, but they can be examined, questioned, and revised. This is the mechanism behind approaches like cognitive behavioral therapy: identifying automatic beliefs that distort perception, examining whether they hold up, and gradually replacing them with more accurate ones. The process is slower than working with breath or attention, but often more far-reaching because shifting a belief changes not just a single response, but the lens through which whole categories of experience are perceived.

These three systems share a similar structure: they run automatically, they can be brought into awareness, and they can be influenced with practice. What makes them valuable is not just that they are powerful, but that they are accessible. Most efforts at change focus on outcomes or behaviors, which are often downstream of processes that are not directly reachable. Semi-controllable systems sit closer to the source. Working with them develops influence within internal systems that are usually invisible. In a life that often feels like it happens to you, these are the places where you happen back.