A Profound Source: Science and the Maturing of Spirituality

“Science is not only compatible with spirituality; it is a profound source of spirituality.” 
—Carl Sagan

I. The Impulse Is Real

Something in human beings will not leave mystery alone. It has never left mystery alone. At Göbekli Tepe in southeastern Turkey, hunter-gatherers constructed massive stone temples as early as 9500 BCE — before cities, before agriculture, before writing. These people were struggling for daily survival, and yet they invested enormous collective energy in building sacred spaces. The archaeologist Klaus Schmidt, who spent decades excavating the site, suggested that “first came the temple, then came the city.” The spiritual impulse may have been among the first forces that organized human civilization, not its by-product.

Across every culture and every era, we find the same phenomenon: human beings reaching toward something larger than themselves. They seek meaning: Why are we here? Do we matter? They seek to make some peace in the face of suffering and death. And they seek connection, a sense of belonging to something beyond the narrow circle of their immediate lives. These are not neurotic symptoms. They are expressions of genuine psychological and existential needs, and they persist whether or not one is religious, whether or not one believes in anything supernatural at all.

The spiritual impulse, in short, is universal and real. It deserves to be taken seriously. The question is not whether to honor it, but how.

II. What the Impulse Does When Left Undisciplined

Left to its own devices, the spiritual impulse gets captured — not by malice, but by the very cognitive tendencies that made our ancestors effective survivors.

We are, at our evolutionary core, pattern-seeking animals with a strong bias toward seeing agency in the world around us. This tendency — what cognitive scientists call “agency detection” — was adaptive. In a world of predators and uncertain environments, it was safer to assume that the rustle in the grass was a lion than to assume it was just the wind. The cost of a false positive was minor; the cost of a false negative could be fatal. So our minds learned to err on the side of seeing purpose and intention everywhere, even where none exists.

Add to this our deep need for certainty. The world our ancestors inhabited was dangerous and unpredictable, and uncertainty and lack of control was genuinely threatening. The mind that could impose a story on chaos — this storm is the anger of a god who can be appeased, this disease is a curse that can be lifted — experienced less anxiety than the mind that simply sat with not knowing. Even false certainty was more comfortable than honest uncertainty. Evolution, which cares only about survival and reproduction, rewarded the storytelling mind.

And then there is the need for relief from responsibility. If the cosmos has a plan, if a divine authority is in charge, if the arc of history bends toward justice by design, then the weight of existence is partially lifted from our shoulders. Something or someone outside us has a plan and is managing things. We are participants in a story already written, not authors responsible for writing it ourselves.

These tendencies — agency detection, the need for certainty, the desire to offload responsibility — are not character flaws. They are the predictable outputs of a nervous system shaped by millions of years of survival pressure in a world very different from the one we now inhabit. But they do mean that the spiritual impulse, when undisciplined, tends toward a particular kind of expression: one that sees personal agents behind impersonal forces, that prefers comforting stories to difficult truths, and that looks for something outside the self to provide meaning, security and salvation.

It is important to be precise about what is being described here. The target is not religion, or any particular tradition. Religious traditions are as varied in their discipline as people are — which makes sense, because they come from people. Every tradition contains both the undisciplined and the disciplined expression of the spiritual impulse: mystics and dogmatists, contemplatives and fanatics, those who have faced the hardest questions honestly and those who have avoided them carefully. The same variability appears in secular life. A person can be scientifically literate and still reach for false certainty, tribal loyalty and the comfort of narratives that do not submit to examination. What is being described here is not a property of religious institutions but of human cognitive tendencies — tendencies that operate in all of us, in every context, whenever the spiritual impulse is left undisciplined.

A spirituality that has not been examined is, to borrow a phrase, a spirituality that has not yet grown up.

III. What Science Actually Is

Before we can understand what science does to the spiritual impulse, we need to understand what science actually is. And it is not primarily a body of facts. The periodic table, the theory of evolution, the laws of thermodynamics — these are products of science, not science itself.

Science is a stance toward reality. It is what happens when two things are held together: a commitment to truth and an honest acknowledgment of human fallibility. The commitment to truth means caring enough about what is real to let it constrain your beliefs — to ask questions of reality and then actually listen to the answers, even when those answers are not what you hoped for. The acknowledgment of fallibility means recognizing that our intuitions can mislead us, our hopes can bias us, our memories can deceive us and that the strength of our conviction is no guarantee of the accuracy of our beliefs.

As the physicist Richard Feynman put it: “The first principle is that you must not fool yourself — and you are the easiest person to fool.” Science is the systematic attempt to build a practice around that recognition. It creates conditions under which reality can contradict us. It requires that we specify, in advance, what would count as evidence against our beliefs — and then actively look for it. It builds in the expectation of error and the mechanisms for correcting it.

This is why science works where our minds, left to their own devices, fail us. It is not that scientists are smarter or more virtuous than other people. It is that the scientific method is specifically designed to counteract the cognitive tendencies that make us unreliable truth-seekers: confirmation bias, motivated reasoning, wishful thinking, tribal loyalty. Science is, among other things, an institutionalized practice of epistemic humility.

And crucially, science also turns its attention inward. Evolutionary psychology, neuroscience, cognitive science — these disciplines have given us an unprecedented view of our own minds: where our biases come from, why we crave certainty, how we construct and protect our beliefs, what drives us toward magical thinking. This self-knowledge is not comfortable. But it is honest. And it is the beginning of something important.

This raises a question: Why should a human being prefer truth over comforting illusion? The answer is not that truth feels better — often it does not. The answer is pragmatic and structural. A life built on comforting illusions is dependent on those illusions remaining unchallenged, which reality eventually refuses to cooperate with. The foundation is brittle precisely because it requires management — certain questions must not be asked, certain evidence must not be examined too closely, certain doubts must be suppressed. When reality intrudes, as it inevitably does, that kind of foundation can shatter.

Faith, in its most common usage, often functions as this kind of management. It insulates a belief system against the pressure of contrary evidence — not by answering challenges but by placing the foundation beyond the reach of challenge. The structure looks solid. But its solidity depends entirely on the blows not landing. A foundation built on honest engagement with reality works differently. It does not avoid the blows. It absorbs them. What remains after honest examination has done its work is not weakened but strengthened — the way a load-bearing structure tested under stress is more trustworthy than one that has never been tested at all. There is nothing left to defend against, because nothing was hidden from the beginning. This stress-tested ground is what a mature spirituality stands on.

IV. Science Matures the Spiritual Impulse

Carl Sagan observed that science is a profound source of spirituality. This claim is often taken to mean that science inspires awe — that contemplating the cosmos, or the history of life, or the strangeness of consciousness, produces a sense of wonder and connection. And this is true as far as it goes. But it does not go far enough.

The deeper truth is this: The disciplined approach to reality that science offers sharpens and matures the spiritual impulse — but it does not create it. The impulse is already there, built into human nature by evolution, expressed in every culture that has ever existed. Not every person feels it equally. Some people seem genuinely content without asking existential questions — they work, raise families, find satisfaction in the immediate world, and live full human lives without being driven by the kind of searching that this essay addresses. There is nothing deficient about that. This essay is written for people in whom the impulse is strong enough to demand to be taken seriously — people who have outgrown the answers they were given but have not yet found anything solid to stand on. For them, science offers something essential: not the impulse itself, but the discipline that allows it to become what it is capable of becoming. And crucially, science does not merely remove illusions — it helps ensure that the meaning we do find is not built on them.

Consider what happens when the scientific stance is applied to the spiritual impulse itself. The tendency to see personal agents behind impersonal forces: Science names it, traces its evolutionary origins, and makes it visible. Once visible, it can be examined. The need for false certainty: Science teaches us that honest uncertainty is not a failure but a prerequisite for genuine knowledge — and that we can survive it, that we can even thrive within it. The desire to offload responsibility to divine authority: Science makes clear that the universe operates according to physical laws, not moral ones, and that no external authority is managing things on our behalf. Nothing can be offloaded. We are responsible for this.

This last point is the most demanding, and perhaps the most important. A spirituality that has honestly faced it — that has stopped looking for something outside itself to provide salvation, meaning or cosmic guarantee — is a spirituality that has grown up. And it is, paradoxically, more resilient than the spirituality that preceded it. A stress-tested foundation does not shatter when confronted with difficult facts, because it was built on them. The habit of placing truth above personal comfort, practiced over time, creates a human being who is harder to break — not because they feel nothing, but because their ground does not depend on illusions remaining intact. But resilience is not the whole story. A life built on honest engagement with reality also allows deeper engagement with what is actually there — richer relationships, more genuine wonder, more honest meaning. Not merely survival, but fuller living. Carl Sagan illustrated this at the end of his life. Dying of a rare blood disease, he did not retreat into supernatural consolation or sudden certainty about what comes after. He faced death with the same honest curiosity he had brought to everything else — still working, still wondering, still expressing gratitude for the extraordinary improbability of having existed at all. That equanimity, and that richness, were not despite his scientific worldview. They were because of it.

V. What a Mature Spirituality Looks Like

A mature spirituality is not the absence of wonder. It is wonder that has been deepened rather than cheapened. When we understand that the elements in our bodies were forged in the cores of dying stars, that every living thing on Earth shares a common ancestor, that the universe has been expanding and evolving for nearly 14 billion years and produced, among its countless expressions, the capacity for consciousness and care — this is not a diminishment of mystery. It is an intensification of it. The more honestly we see what is, the more staggering it becomes.

Meaning, once honestly examined, must be made rather than merely received. When the universe is understood to be indifferent to our individual fates, we cannot simply accept the meaning handed to us by tradition or authority. We must take responsibility for constructing our own significance — in our relationships, our work, our commitments, our choices. This is harder than receiving meaning from above. But meaning built on honest ground is also more fully ours — and less likely to collapse when tested.

A mature spirituality is not the absence of belonging. But the circle of belonging, once science has shown us who we actually are, cannot remain tribal. We are one species among millions, on one planet among billions, in one galaxy among trillions. The moral logic of belonging — my survival is bound up with yours, our survival is bound up together — extends outward once we understand how large the relevant group actually is. Mature belonging means belonging to the species, to life itself, to the cosmos that produced us.

And the peace available to someone who has honestly faced their situation is different from the peace of one who has not. It is not the peace of unexamined certainty, which is brittle and depends on not looking too closely. It is the peace of having looked and continued anyway — of having accepted finitude, uncertainty and responsibility, and found within that acceptance something solid enough to stand on.

VI. The Stakes

This is not merely a personal matter. There is a personal argument for mature spirituality — that it produces a more resilient, more honest, more fully lived human life. That argument has been made above. But there is a more urgent one.

We are animals with tribal instincts, short-term cognitive bias, and a tendency to see agency and meaning where none exists. For most of human history, these tendencies were manageable. The scale of our actions was limited enough that their consequences were mostly local and recoverable. That is no longer true. We have built technologies powerful enough to destabilize the climate, trigger nuclear war, collapse ecosystems and concentrate power in ways that make democratic accountability nearly impossible. And we are bringing into that world the same nervous system that evolved for a tribe of 150 people on the ancient savanna.

If we do not understand our own nature — our tribalism, our short-sightedness, our susceptibility to authority and magical thinking, our tendency to prefer comforting stories to difficult truths — we will destroy ourselves. We are already well along that path. Climate change is not primarily a technological problem. It is a problem of short-term thinking over long-term consequence, of tribal loyalty over species-level responsibility, of the desire for comfortable stories about continuity over the uncomfortable facts of what we are actually doing. These are failures of exactly the cognitive tendencies described in Section II above. And they will not be corrected by better technology alone. They require exactly what science-informed maturity produces: honest self-knowledge, expanded concern and the willingness to accept responsibility that cannot be offloaded.

This is why the spiritual impulse matters at civilizational scale, not just at the personal one. A species that has matured its spiritual life — that has learned to see its own cognitive tendencies clearly, to expand its circle of concern beyond the tribe, to face long-term consequences honestly, and to accept that nothing external will manage things on its behalf — is a species that has at least a chance. A species that has not is one that will keep reaching for agency, certainty, and salvation from outside itself, in a world that requires something harder and more honest.

Carl Sagan saw this. He wrote of our civilization’s need for a marriage of scientific and spiritual maturity — not one replacing the other, but each informing and completing the other. He saw that the same cognitive habits that make us vulnerable to pseudoscience and magical thinking also make us vulnerable to the political and moral failures that threaten our survival. And he saw that science, taken seriously as a way of being rather than merely a body of knowledge, was the antidote.

The spiritual impulse is one of the most important things about us. It is worth honoring. But honoring it does not mean protecting it from examination. It means giving it the discipline it needs to become what it is capable of becoming.

Science is how we do that — not by destroying the impulse, but by maturing it. By refusing to let it remain a child.