Imagine a television. All the channels exist at the same time. The TV does not create the shows. It simply selects which channel is displayed.

You only see one channel because your TV is tuned to that channel. Changing the channel does not create a new show or destroy the others. It only changes which part of what already exists is being shown.

NDR says your experience of the world works the same way. Reality contains many layers and many possible domains. Your access state determines which domain you are routed into experiencing. You do not create the world you see. You select which part of reality you experience.

The fact that you are tuned to one "channel" does not mean the other channels stop existing. They continue to exist at the same time.

Think about the internet. The internet is vast, but when you type in a single website address, you only see that one site. The rest of the internet does not disappear. It still exists, but you are not currently accessing it.

In the moment that you are on, for example, google.com, it appears as if "Google" is the only world that exists. That is your current experienced reality—not because it is the only site that exists, but because it is the URL you are currently routed to.

If you change the URL, you are not creating a new internet. You are simply being routed to a different part of the same underlying network. In the same way, when an observer's access conditions change—through tools, energy, resources, mindset, perception, or other constraints—they are not creating a new reality. They are being routed to a different domain within the same larger structure.

You cannot walk into space without a spacesuit. You cannot go deep underwater without scuba gear. Those environments still exist, but your body alone cannot survive in them or observe them directly.

The suit or the gear does not create a new world. It changes your access to an existing one. By changing your equipment, you change the conditions under which you can exist and observe.

NDR uses this as a clear example of routing: when you change the conditions of access, you change which domain you can inhabit and observe. The world does not change. Your route into it does.

Microscopes let us see tiny worlds. Telescopes let us see faraway worlds. Without these tools, those worlds are still real, but invisible to us.

So again, the world does not change. Our access changes. And when access changes, the world we experience changes. The tools allowed us to route to that world. The world was already existing.

Dreaming is a literal example of a world within a world.

When a person dreams, their body remains in the same place. The external environment does not change. Sensory input is largely reduced. Yet the person experiences an entire, coherent world with its own spaces, events, and timelines.

This shows that radically different experienced worlds do not require transport, new environments, or the creation of separate universes. The only thing that changes is the internal state of the brain.

TV in the dream: If a television is playing while someone is asleep, there is a high probability that elements of that external world will appear inside the dream. Sounds, voices, or images from the room can be incorporated into the dream narrative.

This shows that nested domains can interact in limited, structured ways without collapsing into one another. The outer world shapes the inner one through constrained information transfer.

Your body is made of cells. Those cells are made of molecules. Your body also contains vast communities of bacteria and other microorganisms that live their own complete biological lives inside you. From their perspective, your body is an environment—a world with regions, resources, hazards, and constraints.

This is not a metaphor. It is a basic fact of biology. The human body contains more microbial cells than human cells. You are not just a single organism. You are an ecosystem.

At the same time, you yourself live within a larger environment: the surface of the Earth. The Earth provides the air, water, temperature range, and chemical cycles that make your life possible.

This is a concrete example of worlds within worlds that already exists. Smaller domains are nested inside larger ones. Each level has its own dynamics, but none are isolated.

Life on Earth began in water. This is not speculation, but a central conclusion of modern biology and geochemistry. The earliest evidence for life points to aquatic environments, and all known living cells still depend on water for their basic chemical processes.

Your body is mostly water. The surface of the planet is mostly covered by water. At every scale, life is embedded within and dependent on aqueous environments.

This is a clear example of continuity across domains. Smaller living systems exist within larger environmental systems, and they cannot be separated from them without ceasing to function. Cells depend on bodily fluids. Bodies depend on planetary water cycles.

These domains are not separate worlds. They are connected layers of one continuous structure, with dependence flowing across scales.