The Word We Stopped Saying: What a Soul Might Actually Be

There is a word almost nobody says in a hospital. It survives comfortably in song lyrics, and in eulogies, and in the sort of late conversation where people admit things they would not admit at noon. But say soul in a clinical setting and the temperature in the room drops half a degree. Everyone finds something interesting on the floor. Among those of us who work with brains and nerves for a living, the word carries a faint odor of the attic. It sounds like something our grandparents used before the scanners got good.

And yet I keep meeting moments in my clinic where I have no other word available. A patient sits across the desk from me. The numbers explain a great deal and somehow not the main thing. The imaging is a map of territories, and the person in front of me is not anywhere on that map. I have never found a better name for what is missing from it.

Part of the trouble is that the word has been handled badly for a very long time. For centuries it has been squeezed into one of two shapes. In the first, the soul is a kind of ghost: a separate substance made of some other material, lodged temporarily in the body like a guest in a rented room, and presumably able to leave by the window. In the second, it is nothing at all, a leftover superstition that the sciences have quietly retired. What surprises people is that the Catholic tradition never held either of these. At its center sits a third picture, and it is stranger and far more interesting than the ghost.

Thomas Aquinas called the soul the form of the body. His Latin phrase, anima forma corporis, has been mishandled so often that it is worth slowing down over. A form, in his vocabulary, is not another material layered on top of the first one. It is the arrangement that makes a given material be this particular thing rather than a heap. So the soul, for Aquinas, is not an object stored somewhere inside you. It is whatever makes this living body be this person. He was cutting a path between the two errors that surrounded him, and he was careful about it: on his account a human being is not a soul driving a body around. A human being is a soul and a body that were never two things to begin with.

When I try to explain this, I usually reach for music. A song is made of notes on a page and of air moving in a room. Take the notes one at a time and you do not have a song. Measure the air pressure with perfect precision and you still cannot say why the sound made someone’s chest tighten. The song is not a ghost hovering above the notes. It is also not the sum of them. It is whatever gathers them into a single motion, and that gathering is closer to what Aquinas meant by form than anything I can draw on a whiteboard.

What has kept me interested is that several modern thinkers, working in fields with almost nothing in common, ended up circling the same idea. George Ellis, a cosmologist, argued for downward causation: that higher-level organization genuinely shapes what the lower-level parts do, so that mind need not be a byproduct of the brain but may be an ordering principle acting through it. Karl Rahner described the human being as structurally open toward an infinite horizon, always reaching past whatever has been reached, in a way no scan will ever finish capturing. Hans Urs von Balthasar looked at what happens when beauty stops your breath and insisted it is not a stimulus and a response but the whole person answering. Edith Stein, mapping empathy as a phenomenologist, held that our access to another mind is a direct encounter rather than the conclusion of an argument we run.

A physicist measuring the universe, a theologian chasing mystery, an aesthetician following beauty, a phenomenologist watching one person meet another. Four people with no obvious point of contact, each digging into the wall of a separate small room, who came out into the same room together.

I should say clearly what irreducible does not mean. It does not mean the parts are unimportant. Integration only ever happens on top of parts: without movement and language and memory there is nothing to hold together in the first place. But you can draw those components with any degree of precision you like and the binding of them into one person will not appear on the list. Twenty musicians who each play their instrument beautifully do not thereby produce an ensemble. Whatever makes them one performance is not an item in the addition. The old word was pointing at what lies outside the sum.

I saw that once and have not been able to put it down since. I volunteer at a nursing home, where most of the residents are living with dementia, and there was a woman there who had been losing pieces for a long time. She no longer reliably held onto the names of her family. A sentence she had spoken would be gone within minutes. Her daughter-in-law came often, and one afternoon she sat by the bed and sang a few bars of an old hymn, quietly, not for anyone but herself. The woman’s lips began to move with the next line. The names were gone. The song she had sung her whole life was still there.

The scores measure how fast the pieces are falling away. They do not measure the person underneath, who is keeping a different kind of time.

That is nearly what I said to her daughter-in-law before I left, though I said it less well. Forgetting a name is not the same as ceasing to be. She was quiet for a while, and then she leaned back toward the bed and said she would sing one more. I never wrote any of it down. There is no field for it.

Someone will say that four thinkers converging proves nothing, that people find patterns because people like patterns, and the objection is fair. But when climbers who set out from different valleys meet one another on a summit, we usually stop treating the summit as a coincidence and start treating it as a mountain. Cosmology, theology, aesthetics and phenomenology arrived at the same integrated person from four directions. That does not settle the question, and I want to be honest that it does not. Whether neuroscience will one day account for this integration completely, or whether something here resists explanation in principle, is genuinely open. I do not know the answer, and I am suspicious of anyone who says they do.

What I think can be said is more modest. The soul is not a ghost in the machinery, and it is not a fairy tale we have outgrown. It may simply be the oldest and most accurate name we have for the fact that a person holds together — that somewhere beneath the pieces coming loose, someone is still there, and is still, unmistakably, herself.

📖 These reflections draw from my books. Start with The God Neuroscience Found on Amazon, or see all my books on my author page.

These essays are personal reflection at the intersection of neuroscience and faith — not medical advice.