When physicists ask what is a field?, the answer is often phrased in terms of mathematics: a field is a region of space in which every point is assigned a value — a force vector, a scalar potential, or a tensor. This picture has proven immensely powerful. Fields explain gravity, electricity, magnetism, and the standard model of particle physics. But their very power can obscure their nature.
Fields are rarely unpacked as abstractions. We use them — but what exactly are we using?
This series invites a return to first principles. Not to discard what physics has achieved, but to view it through a relational lens — one in which meaning does not reside in things, but in participation. Fields, in this lens, are not stuff in space. They are structures of potential. They define not what is, but what can happen.
In this way, they resemble the meaning potentials familiar from systemic functional linguistics. Just as language is a system of potential meaning that can be instantiated as actual speech or writing, a field is a system of potential interaction that can be instantiated as actual phenomena. Fields are not entities. They are relational affordances — constraints on how something can participate with something else.
Beyond the Substance Metaphor
We often inherit metaphors that go unquestioned. One such metaphor is that of the field as a kind of invisible “substance” stretched over space, like a fabric that ripples and folds. This has some heuristic value, especially in visualising effects like curvature in general relativity or wave interference in quantum fields.
But this substance metaphor is a holdover from an object-oriented ontology — the idea that reality is fundamentally composed of things, with relations added afterward. In a relational ontology, the starting point is different: it is relations that give rise to the experience of things, not the other way around.
From this perspective, a field is not something that occupies space; rather, it is what gives space its structure. Or more precisely: it gives experience the potential to be structured spatially, in a certain way. Fields are not parts of reality; they are grammars of participation.
Fields as Structured Potentials
To speak of a field, then, is to speak of a structured set of potentialities. What kind of potentialities? That depends on the field:
A gravitational field is a structured potential for mass to participate in spatial unfolding.
An electric field is a structured potential for charge to be displaced.
A magnetic field is a structured potential for moving charges to be deflected.
A quantum field is a structured potential for a particular kind of particle-event to be actualised.
Each field defines a topology of affordance — a map of what kinds of interactions are possible where, and how likely or constrained those interactions are.
Importantly, the field is not the interaction itself. Nor is it the agent that causes the interaction. It is the relational context in which participation becomes meaningful — and possible.
A Field Is Not a Thing but a Possibility-Space
If we ask, “Where is the field?” we must already reframe the question. For a field is not a “thing located” at a point. It is a map of how meaning can be enacted through participation. Its coordinates are not simply spatial but relational: it makes sense only in terms of what can occur, not what is statically there.
In this sense, a field is not like a pebble on the road, but more like a musical score. It is a set of structured possibilities awaiting actualisation through performance — and performance always requires a participant.
Toward a Participatory Physics
This reframing matters because it pushes us toward a different conception of physical theory. Instead of describing an external reality populated by interacting objects, we describe a web of potential interactions whose structure constrains what can appear, how, and when.
It is not that fields act on particles. Rather, a field is the structured space in which a particle-event may arise. This means that particles are not things in a field — they are instances of the field's potential, actualised through relation.
Just as meaning arises not from words alone but from their relation to a system of meanings, so too do physical events arise not from isolated actions but from their resonance with structured fields of potential.
Coming Next: Fields as Meaning Potentials in Physics
In the next post, we’ll deepen this comparison. We’ll explore how fields operate as systems of potential, and how their constraining function mirrors the grammar of meaning in language. What is selected, what is foreclosed, and how does that structure give rise to the world we perceive?
Because to understand fields is not to see further into the void — it is to understand more deeply how we participate in bringing reality forth.
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