At 12:47 PM on a Wednesday, Priya Deshmukh's Swiggy order arrives at her desk in Magarpatta.
She's a project manager at a mid-size IT company, thirty-one, married, one kid in daycare. She ordered at 12:20 — the usual: dal, rice, chapati, bhindi sabzi, and a small container of dahi from a tiffin service called GharKaKhana. ₹150 including delivery. The food is warm. She opens the containers, moves her laptop aside, and eats while half-reading a Confluence document about sprint velocity.
She finishes in fourteen minutes. Puts the containers in the pantry bin. Goes back to her screen. The food is already forgotten.
Here is what Priya did not think about during those fourteen minutes:
Where the rice came from. What energy the rice plant used to build each grain. How old that energy is. How far it travelled. And who — or what — put it there in the first place.
She doesn't need to think about this to eat. Nobody does. But today, we're going to follow Priya's ₹150 lunch backward — ingredient by ingredient — further than anyone normally follows it. Not because it's a spiritual exercise. Because it's interesting. And because where the trail ends will surprise you.
The Rice
Let's start with the most boring item on Priya's plate. A mound of plain white rice. Steamed. Unremarkable. The kind of thing you eat without tasting.
That rice started as a paddy plant in a field — let's say in the Konkan region, or maybe Kolhapur district, because that's where a lot of Maharashtra's rice comes from. The farmer planted it during the kharif season, sometime in June. The monsoon brought water. The field was flooded. And then the plant did something extraordinary.
It captured the sun.
Not metaphorically. Literally. The green leaves of the rice plant contain chlorophyll — a molecule whose sole job is to absorb photons of sunlight. When a photon hits a chlorophyll molecule, it kicks an electron to a higher energy state. That energized electron gets passed along a chain of proteins inside the leaf cell, and the energy it carries is used to split water molecules into hydrogen and oxygen. The oxygen is released into the air — the oxygen Priya is breathing right now in her Magarpatta office. The hydrogen, along with the captured solar energy, is used to convert carbon dioxide from the atmosphere into glucose.
That's photosynthesis. And here's what it actually means in plain language: the rice plant took sunlight and turned it into sugar.
Not sugar like the white crystals in your kitchen. Sugar at the molecular level — glucose, C₆H₁₂O₆ — which is the universal energy currency of life on Earth. The plant then converts that glucose into starch and stores it in the grain. A single grain of rice is a tiny battery, charged by the sun.
The equation looks like this:
6CO₂ + 6H₂O + sunlight → C₆H₁₂O₆ + 6O₂
Carbon dioxide plus water plus sunlight becomes glucose plus oxygen. The inputs are air, water, and light. The output is stored solar energy in chemical form.
When Priya eats that rice, her body breaks apart those glucose molecules through a process called cellular respiration — essentially photosynthesis in reverse. The chemical bonds that the plant spent weeks building, using sunlight, are now broken open inside Priya's cells. The stored solar energy is released as ATP — adenosine triphosphate — the molecule that powers every single thing her body does. Every muscle contraction. Every nerve signal. Every heartbeat. Every thought she's having about sprint velocity right now.
Priya is running on sunlight. She just doesn't know it.
The Chapati
Okay, rice is a plant. That one's easy. But what about the chapati?
Same story. The chapati is made from wheat flour. Wheat is a grass — Triticum aestivum — that grows in fields across Madhya Pradesh, Punjab, Rajasthan. Like rice, it captures sunlight through photosynthesis and stores the energy as starch in its grain. The grain is harvested, milled into flour (atta), shipped to Pune, bought by GharKaKhana's cook, mixed with water, kneaded, rolled, and cooked on a tava.
Every calorie in that chapati traces back to a wheat plant standing in a field, catching photons.
The Bhindi
Bhindi — okra — is a flowering plant. It photosynthesizes. The green colour of the bhindi is itself the evidence: chlorophyll, the molecule that captures sunlight, is green. When you see a green vegetable, you're looking at a solar panel. The calories and nutrients in the bhindi — the carbohydrates, the vitamin C, the folate — were all manufactured by the plant using solar energy as the power source.
The Dal
Toor dal comes from the pigeon pea plant (Cajanus cajan), widely grown in Maharashtra. Again — photosynthesis. The plant captures sunlight, converts it to glucose, stores it as protein and carbohydrate in the seed. The protein that Priya's body will extract from this dal and use to repair her muscle tissue tonight while she sleeps? That protein was assembled by a plant using the sun's energy.
The Dahi
Now here's where someone says, "Okay, but dahi isn't a plant."
True. Dahi is made from milk. Milk comes from a cow or buffalo. But what did the cow eat? Grass. Hay. Silage. Cattle feed — which is made from grains, oilseed cakes, and crop residues. Every single thing the cow ate was a plant, or derived from a plant, that grew by capturing sunlight.
The cow didn't create the energy in the milk. She processed it. The energy originated in the grass, which captured it from the sun. The milk is sunlight, processed through a cow. And the dahi is sunlight, processed through a cow and then through bacteria.
Close Every Exit
At this point, a reasonable person might try to find an exception. Let's close every exit.
"What about honey?" Bees collect nectar from flowers. Flowers are parts of plants. Plants photosynthesize. Honey is sunlight, concentrated by bees.
"What about meat or eggs?" The animal ate plants, or ate something that ate plants. Every food chain on Earth begins with a photosynthetic organism. There are no exceptions. Even deep-sea hydrothermal vent ecosystems, which don't use sunlight, use chemical energy from the Earth's interior — but nobody's eating that for lunch in Magarpatta.
"What about mushrooms?" Fungi don't photosynthesize. But they decompose organic matter — dead plants, dead animals — that originally got their energy from photosynthesis. Mushrooms are sunlight recyclers.
"What about salt? Water?" Not calories. You cannot run your body on salt and water alone. Every calorie — every unit of energy your body uses to do anything — traces back to a plant capturing sunlight.
There are no exceptions. Zero. Every food chain on this planet begins with photosynthesis. This is not philosophy. It is biology. It is not debatable. It is settled science, known for over two centuries, taught in every Class 8 textbook.
Every calorie Priya Kulkarni has ever eaten in her thirty-one years of life — every meal her mother cooked, every birthday cake, every chai, every plate of pani puri from a street vendor — was stored sunlight.
The Number
Let's put a number on it, because numbers make things real.
The sun emits roughly 3.8 × 10²⁶ watts of power every second. Of that, Earth intercepts about 1.7 × 10¹⁷ watts — a tiny fraction, but still an absurdly large number. Of that, photosynthetic organisms on Earth capture roughly 130 terawatts — about 0.08% of what reaches us. And from that captured solar energy, the entire food supply of 8 billion human beings is derived.
Priya's ₹150 lunch represents a minuscule fraction of that chain. But the chain is real, traceable, and unbroken. From the nuclear fusion reactions in the sun's core, to the photons that travel 150 million kilometres in 8 minutes and 20 seconds, to the chlorophyll molecules in a rice paddy in Kolhapur, to the starch in a grain, to the dal-rice on Priya's desk, to the ATP in her cells right now — it's one continuous energy transfer.
She didn't just eat lunch. She ate a 150-million-kilometre delivery.
The Question That Biology Can't Answer
So here we are. The chain is fully traced. The science is clean. No faith was required at any step. Photosynthesis, cellular respiration, ATP — this is Class 12 biology, not mysticism.
But notice something. We've described how the energy gets from the sun to Priya's plate. We've described the mechanism beautifully. What we haven't described — what biology, chemistry, and physics are structurally unable to describe — is why the sun has the energy it has in the first place.
The sun's energy comes from nuclear fusion — hydrogen atoms fusing into helium at 15 million degrees Celsius in the core. That's the mechanism. But the mechanism depends on a set of physical constants — the strength of the strong nuclear force, the gravitational constant, the mass of the proton — that have very specific values. If the strong nuclear force were 2% weaker, protons couldn't fuse. No fusion, no sunlight, no photosynthesis, no food, no Priya. If it were 0.3% stronger, hydrogen would have been exhausted in the first few minutes after the Big Bang. Again — no stars, no light, no food, no us.
These constants are not derived from some deeper mathematical necessity. Physics describes them. Physics does not explain them. They simply are what they are. The "how" is fully mapped. The "why" is wide open.
And that is where one very old book says something very specific.
The Verse
Five thousand years before anyone used the word "photosynthesis," this was spoken on a battlefield:
यदादित्यगतं तेजो जगद्भासयतेऽखिलम् । यच्चन्द्रमसि यच्चाग्नौ तत्तेजो विद्धि मामकम् ॥
yad āditya-gataṁ tejo jagad bhāsayate 'khilam yac candramasi yac cāgnau tat tejo viddhi māmakam
"The splendor of the sun, which illuminates this entire world — and the splendor in the moon, and in fire — know that splendor to be Mine."
— Bhagavad Gita 15.12
Look at what Krishna does and doesn't claim here.
He does not claim to be the plant. He does not claim to be the farmer. He does not claim to be Swiggy. He steps into the chain at exactly one point — the sun — and says: that teja, that splendor, that specific energetic output that makes everything else possible? That's Mine.
He's not competing with the biology. He's not replacing the chemistry. He's answering the one question the chemistry leaves open: where does the sun's energy come from? Not mechanistically — fusion answers that. But originally. Why does fusion work? Why do the constants have the values they have? Why is there a sun at all?
Krishna says: because I put that splendor there. Tat tejo viddhi māmakam — know that splendor to be Mine.
What Changes
Nothing changes on Priya's desk. The dal is still dal. The rice is still rice. The Confluence document still needs reviewing. Swiggy still charged ₹150.
But if Krishna is right — if the sun's splendor does originate with Him — then the chain doesn't end at the sun. It ends one step further back. And Priya's ₹150 lunch isn't just stored sunlight. It's stored divine energy, passed through a star, captured by a plant, cooked in a kitchen, delivered by a rider on a scooter, and eaten at a desk in Magarpatta by a woman who has no idea that the energy keeping her alive right now travelled 150 million kilometres and 5,000 years of scripture to reach her plate.
She doesn't need to know this to eat. She doesn't need to believe it to digest. The chain runs whether she traces it or not.
But there's something that shifts when you see it. Not belief — not yet. Just a pause. The next time you eat — tonight, tomorrow morning, whenever — you might catch yourself tracing it. Plate. Farm. Sun. And then one step further, to the question the sun can't answer about itself.
That pause is the beginning of something. Not religion. Not ritual. Just sight.
And that's only the first chain. Because here's what's strange: the building you're sitting in right now? The concrete, the steel, the glass, the electricity running through the walls? That's also sunlight. Every brick of it.
But that's the next chapter.