Let’s move from the narrative of the self to the cold, hard bookkeeping of physics. If your thoughts and your awareness are real—and they are the most real things you ever experience—then they must exist within the same physical framework as the rest of the universe. There’s a fascinating, albeit speculative, way to look at this through the lens of mass—energy equivalence. Einstein’s famous equation, E=mc², tells us that energy and mass are just two sides of the same coin. Every time a neuron in your brain fires, it uses a tiny amount of energy. When you aggregate the energy required to sustain a single, coherent "moment of mind," you land on a very specific number—roughly 57,000 electron volts, or 57 keV. Now, on its own, that’s just a bit of biological accounting. But here’s where the mystery deepens: that specific energy scale overlaps almost perfectly with the predicted mass of certain dark matter candidates, like sterile neutrinos.
Does this mean your thoughts are made of dark matter? No, that’s too leap-heavy. But it does suggest that the "scale" of consciousness isn't isolated in some magical, non-physical realm. It sits right in the middle of the descriptive framework we use for the fundamental structure of the cosmos. If a moment of awareness occupies a specific energy scale, we have to ask: what happens to that energy when the biological system carrying it—the brain—breaks down? Physics tells us that information and energy cannot be destroyed, only transformed. This isn't a promise of a personal afterlife where you remember your childhood home, but it is a statement about the persistence of the patterns you’ve created. Your life, your choices, and your very awareness have left physical traces in the universe. In a very literal sense, the information that was "you" is embedded in the fabric of reality.
Consider the idea of "Information Persistence." When the brain stops, the physical traces of your experiences remain. We often mistake the end of the "updater"—the brain—for the erasure of the data. But if the universe keeps stable patterns, and your mind is a pattern of high-level information integration, then the "you" that exists might be less about the cells in your head and more about the unique configuration of energy they held. This leads some thinkers toward panpsychism—the idea that consciousness isn't something the brain "manufactures" out of dead matter, but a fundamental property of matter itself, like mass or charge. If consciousness is everywhere in a rudimentary form, then the brain isn't a creator; it’s an intensifier. It takes the "raw capacity for experience" that exists in every atom and organizes it into a complex, personal narrative. When the brain dies, that organization dissolves, but the raw capacity remains. You don't "end" so much as you disperse back into the broader field of the universe. It’s less like a candle being blown out and more like a wave receding back into the ocean. The wave is gone, but the water—the stuff the wave was made of—is still there, perfectly intact.