Every time you pick up a coffee mug, type on a keyboard, or lean against a wall, the world feels undeniably solid.
Yet the physics of those everyday moments tells a quieter story. At the atomic level, everyday objects are almost entirely empty space. The resistance you feel against your fingers isn't a hard physical collision. It is just the electrons in the object pushing back against the electrons in your hand.
We experience this subtle magnetic resistance as touch.
It is a simple fact of how our world works, but it leaves us with a surprisingly difficult question: if nothing is truly solid, what is everything actually made of?
Hunting for the bottom brick 🧱
For a long time, the assumption was that if you kept zooming in—from molecules to atoms, and atoms to quarks—you would eventually find a tiny, solid marble at the very foundation of everything.
But when physicists finally reached the bottom, the "stuff" was gone.
A subatomic particle isn’t a solid object. It is really just a collection of properties: a specific amount of mass, charge, and spin. If you take those properties away, there is no physical core left behind to hold them. The properties are all there is.
We actually interact with this kind of abstract reality all the time, like when we look at a bank account. When you transfer five dollars from savings to checking, no physical bills move across town. If someone asked, "Which specific dollar bills went across?" the question wouldn't make sense. There were never any physical bills in the transaction, only shifting values.
The universe seems to operate the same way. If you swap two electrons, the universe doesn't change—not just approximately, but exactly.
At its deepest level, reality behaves less like a collection of moving objects, and more like a ledger of shifting values.
The ruler that measures itself 📏
There's a deeper reason the hunt for the bottom brick was never going to end the way we hoped. It's hiding in plain sight:
Every tool we use to investigate matter is itself made of matter.
Think about what that means. To find out what an electron is, we smash it with other particles. To see an atom, we bounce light off it — and light is made of particles too. We are trying to measure the ruler using the ruler.
You've met this trap before, in everyday places:
- A dictionary defines every word using other words. Follow the definitions long enough and you go in a circle — at no point does the book step outside language and hand you the thing itself.
- Your eye can see everything in the room except one thing: itself, seeing.
- A camera can photograph anything in the world except the very act of taking that photograph.
Physics is in the same position. Every experiment ever performed reports how matter interacts — how it pushes, pulls, deflects, and glows in the presence of other matter. What it never reports, and can never report, is what matter is like from the inside, on its own, when nothing is interacting with it.
So the "intrinsic nature" of matter isn't just unknown. It may be unknowable in principle — because knowing is itself an interaction. Science's honest inventory contains relations all the way down, and no capacity to look beneath them.
Notice what that does to the question "what is everything made of?" It doesn't answer it. It dissolves it — the same way "which dollar bills moved?" dissolved. Maybe there was never an "inside" to find. Maybe the relations aren't hiding the stuff. Maybe the relations are the stuff.
Hurricanes and ocean waves 🌊
So if particles aren't little rocks, what are they? Here's a better mental picture.
A hurricane is not a permanent object you can put on a shelf. It's a process — a temporary swirl of wind and water, constantly pulling in new air and throwing out old, never the same thing for two seconds. It has a name, a location, a shape. And it is made of nothing but motion.
Modern physics says a particle is exactly like that:
- The field is the ocean. The universe is filled with invisible, energetic fields that exist everywhere, all the time.
- The particle is the wave. An electron is a temporary wave moving through its field — real, measurable, and made of nothing but the field's own motion.
You can surf a wave. You can be knocked over by one. But you can't take it home in a bucket, because the wave isn't in the ocean — the wave is something the ocean is doing.
Same with a song. A melody isn't in any single piano key; press one key alone and there is no music. The melody exists only in the pattern between the notes — and it's still perfectly real. You can hum it, sell it, get it stuck in your head.
An electron is something the universe is doing.
The hole that fooled the universe 🕳️
Here's where it stops being philosophy and shows up in your pocket.
Inside computer chips, electrons sometimes shift together and leave behind a gap — an empty spot where an electron should be. Engineers call it a "hole." It is, by definition, an absence. Nothing. A missing thing.
And yet the hole acts exactly like a real particle. It has mass. It carries charge. It bounces around. It responds to magnets. The chip in your phone works, right now, because engineers treat this absence as a particle — and reality plays along.
Sit with that for a second. If an "emergent" gap and a "real" electron behave identically, what exactly makes the electron more real than the hole?
There's only one honest answer: the pattern is what's real, not the "stuff."
Even mass — the most stubbornly stuff-like property of all — turns out to be borrowed. Particles don't carry mass inside them; they acquire it by dragging against an invisible field (the Higgs field), the way you feel heavier wading through water. Switch that field off, and the electron weighs nothing at all. The mass was never in the particle. It lived in the relationship.
The web of reality 🕸️
If there are no solid bricks at the bottom, what's left? Both modern physicists and ancient philosophers arrive at the same picture: a giant network of relationships.
Ancient India drew it best. Imagine Indra's Net: a vast web stretching in every direction, with a clear jewel at every single connection.
No jewel has a color of its own. Each one only exists as the reflection of all the other jewels around it. Take away the connections, and nothing is left — not even the jewel.
Now here's the astonishing part: Quantum Field Theory describes the universe the same way. The value of a field at any point is defined by its relation to every other point. No point has content of its own. A physics department and a thousand-year-old text drew almost the same picture.
Erwin Schrödinger — one of the founders of quantum mechanics — saw this coming. The world's multiplicity, he wrote, is a surface trick: two "identical" electrons aren't two things cooperating, they're two heads of the same hydra. He said it while pointing directly at Vedanta, where the idea already had a name: Nama-Rupa — name and form, draped over one underlying reality. The way "wave" is a name we drape over the ocean.
You are what the ocean is doing 🖐️
The history of physics is a story of things thinning out. We went hunting for hard little atoms and found waving fields. Every time we grabbed for the paint, our hands closed on canvas.
Two philosophers of science, Ladyman and Ross, gave the conclusion its bluntest form: every thing must go.
That sounds like a loss. It isn't. Tables still hold cups. Waves still knock you over. Holes still power your phone. Nothing you love disappears — only the assumption that there had to be "stuff" underneath it all. What remains is not a void but an architecture of relations, and it was there the whole time.
And you? You aren't a solid object standing outside the universe, observing it. You are a pattern the universe is currently sustaining — a wave, briefly aware, asking what the ocean is made of.
So here's the question to sleep on tonight:
If nothing is solid — not the table, not the atom, not even you — what, exactly, is doing all the existing?