The Presence That Passes Through

Hold up your hand. It looks solid, right? But right this second, tiny invisible specks are zipping straight through your hand — millions and millions of them — and you can't feel a single one. They're called neutrinos, and they come mostly from the Sun.

Here's the wild part: neutrinos don't stop at your skin. They go right through your hand, through your whole body, through the floor, through the entire Earth, and out the other side, like the world isn't even there! They're passing through you all day and all night, whether it's sunny or dark, whether you're awake or asleep. You never feel them, but they are always, always there.

Isn't it amazing that something can be completely real and completely with you, even when you can't see or feel it at all? That helps us understand something about God. Jesus promised, "I am with you always." You can't see Him with your eyes, but that doesn't mean He isn't right there — closer than the air, present every single moment, no matter what.

Just because you can't see or feel something doesn't mean it isn't real and right there with you. God is always present, always near — even in the dark, even when you don't feel Him. He promised to be with you always, and He keeps His promises.

Why don't neutrinos stop? Because of how they're built. Almost everything you bump into is "stopped" by electric forces — your hand can't go through a table because the electric charges in them push apart. But a neutrino has no electric charge and almost no mass, so those forces simply ignore it. It only feels one of nature's forces, and only very weakly. So to a neutrino, ordinary matter is almost entirely empty space with nothing to grab it.

How empty? Consider this: a neutrino can fly straight through the entire planet Earth — eight thousand miles of rock and molten metal — and the odds are overwhelming that it won't hit a single thing on the way. In fact, you'd need a wall of solid lead about a light-year thick to reliably stop one. The neutrinos from the Sun don't even pause for the Earth. At night, when the Sun is on the far side of the planet, the neutrinos hitting you have just passed up through the whole Earth to reach you from below. Nothing shields you from them. There is no hiding place where they don't reach.

That's a striking picture of the psalm: "I can never escape from your presence! If I go up to heaven, you are there; if I go down to the grave, you are there." The psalmist marvels that there is nowhere God's presence cannot reach — not the heights, not the depths, not the dark. Neutrinos make that almost tangible. If even the Sun's tiny particles pass through the whole Earth unhindered, reaching you from every direction at once, how much more is the presence of the God who made them unable to be walled out.

Sometimes we try to hide — from God, from others, from ourselves — behind walls we hope are thick enough. The neutrino quietly says no wall is thick enough to keep out what truly passes through everything. God's presence reaches you wherever you are, through whatever you've built. And the good news is that His reaching you is not a threat — it's the love you can never get beyond.

If neutrinos pass through everything, how could we ever detect them? It seems impossible — and it nearly is. The trick is pure statistics: send enough of them through enough material, and very rarely, by sheer chance, one will collide with an atom and make a tiny flash of light. So physicists build absurd, magnificent detectors to catch those rare flashes. They take enormous tanks — some holding tens of thousands of tons of ultrapure water or other material — line them with thousands of ultra-sensitive light sensors, and bury the whole thing deep underground, beneath a mountain or in a mine, to block out everything except neutrinos.

Out of the hundred trillion neutrinos passing through your body every second, a detector the size of a building might catch a few per day. And yet those few flashes are pure gold, because neutrinos carry messages from places nothing else can escape. They stream straight out of the Sun's blazing core, telling us what's happening at the center of a star. They arrive from exploding stars across the galaxy. They are, in a real sense, the universe's most honest messengers — precisely because almost nothing can stop or deflect them. What makes them nearly impossible to catch is exactly what makes them able to bring news from the most hidden places.

Paul tells the Athenians that God set things up so people would "feel their way toward him and find him — though he is not far from any one of us." There's something here about how God's nearness works. The most penetrating, most present thing in physics is also the hardest to detect — you have to build something extraordinary, and get very still and very deep, to catch it. Not because it isn't there (it floods through you constantly), but because catching it takes deliberate, patient effort. God is "not far from any one of us." His presence is constant. But noticing it often takes going deep, getting still, and building a life quiet enough to catch the flashes.

It's easy to conclude that because you don't feel God's presence dramatically, He must not be there or must not be near. The neutrino reframes that. The most constant presence can be the hardest to detect — not absent, just quiet, requiring you to get still and go deep to notice what was streaming through you all along. If you're not sensing God, the answer may not be that He's far. It may be that, like a neutrino, His nearness asks you to build a quieter place to catch it.

Neutrinos are a triumph of modern physics — predicted in 1930 before anyone could detect one, finally caught in 1956, now used to image the Sun's core and watch supernovae. We have a whole field of neutrino astronomy. It can feel like a closed chapter. But neutrinos sit at the center of some of the deepest unsolved questions in all of science.

We still do not know the actual mass of a neutrino. We know it isn't quite zero — the discovery that neutrinos "oscillate," changing type as they travel, proved they must have some tiny mass, and earned the 2015 Nobel Prize — but the precise value remains unmeasured, one of the most pursued unknown numbers in physics. We don't fully know why their masses are so absurdly small compared to every other particle. We don't yet know whether a neutrino is its own antiparticle — experiments hunting for a process called neutrinoless double beta decay are running right now to find out. And here is the part that lifts the hair on your neck: many physicists believe neutrinos may hold the answer to why there is anything at all. The Big Bang should have made matter and antimatter in equal amounts, which would have annihilated completely, leaving an empty universe. Something tipped the balance toward matter — and the leading candidate for that something involves the strange behavior of neutrinos in the early universe. The ghostliest, most overlooked particle, the one that slips through everything unnoticed, may be the reason the cosmos isn't empty — the reason you exist. And we are still, actively, trying to find out — chasing it into detectors sunk a mile underground, waiting for the few faint flashes that might finally fix a number the rest of physics has been unable to name.

"Even in darkness I cannot hide from you. To you the night shines as bright as day. Darkness and light are the same to you." The psalmist reaches for the most total concealment he can imagine — wrapping himself in darkness — and confesses it does nothing; to God the dark is not dark. Neutrinos are a faint physical parable of that all-penetrating sight. They pour out of the most hidden place in our sky, the Sun's core, which no light can escape; they pass through the solid Earth as though it were glass; no darkness, no density, no shielding is opaque to them. And they may be why creation exists. It is fitting that the God whose presence "passes through" all concealment would build into the foundations of matter a messenger that does the same — and would, perhaps, hang the existence of everything on the most humble, least graspable thing in it.

There is a loneliness that can deepen with age: the sense of an interior darkness no one sees into — the private grief, the secret failure, the part of yourself you've kept unlit because you fear what its exposure would cost. We imagine that darkness as a place even God doesn't reach, and we are half-afraid of being found there and half-afraid of never being found at all. The psalm speaks directly to both fears, and the neutrino quietly underwrites it. To the One who made the all-penetrating particle, your night already shines as bright as day; there is no shielding you could build that His presence has not already passed through. And — this is the gospel hidden in it — being seen all the way to the bottom is not your ruin but your rescue, because the One who sees into your darkness is the same One who tipped the balance toward existence, toward matter, toward you. You are not hidden from Him. You never were. And His seeing you is the most loving thing that has ever passed through you.