The Mountains Are Moving

Mountains seem like the most solid, unchanging things in the whole world, don't they? They're so big and so still. If you climbed one, you'd think it had been standing exactly like that forever. But here's a secret: mountains are actually moving.

It happens far too slowly for us to see. Some mountains, like the giant Himalayas in Asia, are very slowly growing taller — about as much each year as your fingernails grow! And other mountains are slowly wearing down, getting smaller, as wind and rain and ice carry tiny bits of them away. It takes millions and millions of years, so to us they look perfectly still. But God's mountains are always, very slowly, on the move.

Even the giant mountains — the biggest, most solid things we know — are slowly changing, rising and wearing away over more time than we can imagine. But God holds them all in His hands. The Bible says, "He holds in his hands the depths of the earth and the mightiest mountains." Nothing is too big or too old for God. He is bigger than the mountains and older than them all.

If even the mighty mountains are slowly changing, but God holds them all and never changes — then He is the most solid, dependable thing there is. You can lean your whole life on a God who is bigger and steadier than the mountains.

How do you build a mountain? You need something powerful enough to lift solid rock miles into the sky. That power comes from the slow drifting of the Earth's surface. The outer shell of our planet is broken into huge pieces called plates, and they very slowly move — about as fast as your fingernails grow. When two plates carrying continents push into each other, the rock at the boundary has nowhere to go but up. It crumples and folds and stacks, like a rug bunching when you push it from both ends, and over millions of years it piles into a mountain range.

That's how the Himalayas formed: the plate carrying India has been plowing northward into Asia for tens of millions of years, and it's still going — which is why the Himalayas are still rising today. But the moment a mountain rises, the wearing-down begins: rain, rivers, ice, and wind start carrying it away, grain by grain. Every mountain is caught in a slow, patient tug-of-war between building up and wearing down — a struggle measured not in years but in millions of years.

The psalm gives us God's perspective on time: "a thousand years are as a passing day." We watch a mountain and see something permanent, because our whole lives are too short to notice it move. But to God, the entire rise and fall of a mountain range — tens of millions of years — is unhurried, comfortably within His sight, like watching a single day unfold. Our impatience comes from how small our slice of time is. God is never rushed, because He holds all of time at once.

So much of our anxiety comes from measuring everything against our own short timeline — wanting things resolved now, on our schedule. The mountains gently stretch that out. God works on timescales that build and reshape continents, patiently, never hurried. When His timing feels impossibly slow, remember: He is not late. He simply sees the whole day you can only glimpse an hour of.

Look at a photo of the Appalachian Mountains in the eastern United States — soft, rounded, green, gentle. They look old and tired, like worn-down hills. Now look at the Himalayas — sharp, jagged, towering, snow-capped, dramatic. They look young and fierce. Here's the staggering truth: the Appalachians were once as mighty as the Himalayas.

Hundreds of millions of years ago — long before the dinosaurs — the Appalachians were a colossal mountain range, possibly rivaling the Himalayas in height, formed when ancient continents crashed together. And then, with nothing left pushing them up, time went to work. For roughly 300 million years, rain and rivers and freezing ice and wind wore them down, grain by grain, hauling the mountains piece by piece into the sea. The gentle hills you see today are the roots of those once-towering peaks — what's left after an almost unimaginable span of patient erosion. The Himalayas are young; one day, far in the future, they too will be worn to gentle hills. Every mountain is just a stage in a process too slow for any human to witness.

Peter writes, "a day is like a thousand years to the Lord, and a thousand years is like a day." He says it specifically to people who were growing impatient — wondering why God's promises seemed so slow to arrive, whether He'd forgotten. The mountains answer with deep time itself. What looks to us like permanence or like agonizing delay is, on God's scale, motion and progress we're simply too short-lived to see. The Appalachians did not stop changing because we couldn't watch. Neither has God stopped working because His timing outruns our patience.

Your generation lives at the speed of the instant — and that makes any process longer than a few days feel like failure or abandonment. Deep time is medicine for that. The most dramatic transformations in the world — whole mountain ranges raised and erased — happen so slowly that no single observer ever sees them move, yet they are absolutely real and absolutely underway. When you can't see God doing anything, that is not evidence He's idle. He works on the scale that builds and unbuilds mountains — and what looks like nothing happening may be the slow, certain reshaping of everything.

Geology has given us deep time, and with it a profound recalibration: the realization that the most permanent-seeming features of our world are temporary. Mountains, continents, even the configuration of the oceans are stages in slow, ceaseless change. But how that change actually unfolds — the precise interplay of forces that raises and razes a mountain range — turns out to be a frontier far less settled than the textbook diagrams suggest.

For a long time the picture was simple: tectonic plates push mountains up, and erosion wears them down, two separate processes. But over recent decades it has become clear that these are deeply, surprisingly coupled — and the coupling is not fully understood. Erosion doesn't just passively remove what tectonics builds; by stripping away mass, it can actually change where and how rock rises, almost as if the rain and rivers help steer the growth of the mountains beneath them. Climate shapes erosion, erosion shapes tectonics, tectonics shapes climate — a tangled, planet-scale feedback that researchers are still working to model and untangle. Exactly how much each force contributes, how the feedbacks balance, how to read the deep history written in the rock — these remain areas of active and unresolved scientific debate. Even the timescales humble us: we are trying to understand processes that play out over tens and hundreds of millions of years from the vantage of a few human lifetimes of observation. The solid ground beneath us is, on close inspection, a slow and intricate dance we have only begun to read. Ask where a particular peak will stand in fifty million years — higher, or gone, or somewhere the map has no name for yet — and it is a question no geologist can answer with confidence.

Isaiah makes a breathtaking wager. He takes the mountains — humanity's universal symbol of what cannot change — and says even they will move and disappear, and then stakes everything on a single exception: "but even then my faithful love for you will remain. My covenant of blessing will never be broken." It's a deliberate comparison, and modern geology only sharpens its force. We now know with certainty that Isaiah was literally right: the mountains are moving, will disappear, are not permanent at all. He chose the most enduring thing he could name, conceded that it is passing, and located something more permanent still — not in the created order at all, but in the steadfast love of God. The one thing in all of reality that the slow erosion of deep time will never wear away is God's covenant love for His people.

There comes a season in adult life when the things you built your sense of permanence on begin, undeniably, to move — your body's reliability, your parents' presence, institutions you trusted, certainties you assumed were bedrock, perhaps faith itself feeling less solid than it once did. It can feel like the ground giving way, like nothing is fixed after all. Geology says your perception is, in a hard sense, accurate: nothing in the created order is truly permanent, not even the mountains; everything is in slow motion toward change. But Isaiah anticipated exactly this disillusionment and answered it. He does not offer you a more solid mountain. He tells you the mountains were never the thing to build on — and points past every shifting, eroding, temporary security to the one love that deep time cannot touch. When the mountains in your life move, as they will, that is not the loss of all stability. It is the stripping away of false permanence so that you finally rest your weight where it always belonged: on a faithful love that will remain when the last hill has worn to the sea.