Heidegger and René Descartes

When Thought Becomes a House – and Human Beings Forget How to Dwell

Some mornings are better than others.

Usually, they come early. The coffee is warm. The light still rests low across the landscape. The world has not yet begun to shout. No news stream. No demands. Only silence, a table, a pen, and the slow feeling that something in life may still be thought through.

In such morning hours, I often read old philosophers. Not to escape the present, but to understand it more deeply. Old thinkers can sometimes see our age more clearly than those who live in the middle of it.

That is how I feel when I read Martin Heidegger on René Descartes in Gesamtausgabe, Volume 23. Here, Heidegger traces the development of philosophy from Thomas Aquinas to Immanuel Kant. When he pauses at Descartes, one senses that something decisive is at stake.

For Descartes is not merely another philosopher. He is a doorway into the modern world.

And Heidegger asks: What entered through that doorway—and what was left standing outside?

When the Ground Begins to Shake

Descartes lived in a time when old certainties were collapsing. Religious unity had fractured. Wars and unrest marked Europe. New sciences challenged inherited truths. Humanity stood in a landscape where much was no longer self-evident.

It may resemble our own age more than we would like to admit.

When the world becomes unstable, human beings seek firm ground. When everything feels fluid, we long for something that holds.

Descartes did something radical. He began by doubting everything that could be doubted.

The senses may deceive us.
Authorities may be mistaken.
Traditions may be weak.
Even what seems obvious must be tested.

What remains?

Descartes answered: When I doubt, I think. And when I think, I must exist.

I think, therefore I am.
Cogito, ergo sum.

It is a powerful sentence. Clear. Sharp. Almost like a sword.

Many people love such sentences. They offer security.

But Heidegger Stops at Another Word

Most people notice the word think.

Heidegger notices the word am.

That is typical of him.

What does it really mean to be?

Not merely to exist as one thing among other things, but to be human. To be in life. To be thrown into time. To be on the way. To be the one you have not yet fully become.

Heidegger believed that Western philosophy had often forgotten this question. It discussed knowledge, morality, soul, nature, and God—but not Being itself.

When Descartes says “I am,” Heidegger thinks he moves too quickly onward. He secures thinking, but does not ask deeply enough what this “I am” truly contains.

As a result, the human being easily becomes understood as an inner center of thought.

A head.

A chamber of consciousness.

Someone looking outward at the world from a distance.

But is that how we actually live?

No One Is Born as a Thinking Head

A child does not enter the world as a little philosopher.

A child arrives with crying, skin, hunger, unrest, need for warmth, trust, and dependence. It first learns gaze, rhythm, and atmosphere—not logic.

This matters.

For it reminds us that human beings are not primarily thinking subjects. We are relational beings from the beginning.

We are carried before we can walk.
We are met before we can speak.
We are shaped before we can choose.
We love before we can explain love.

Here I believe Heidegger sees something Descartes does not see clearly enough.

The human being is always already in the world.

Not beside it.

I Think of My Years in Helping Professions

For many years I worked with people in difficult life situations. Children, parents, families, pain, conflict, hope. There I learned something no theory alone can teach.

A human being is never merely a case.

And yet systems often begin there:

• case number
• decision file
• intervention plan
• diagnosis
• assessment
• follow-up

All of this may be necessary. I am no romantic. Societies need order, methods, and structure.

But when language grows too cold, we lose sight of the other person.

Behind every document there is a face.
Behind every symptom there is a story.
Behind anger there is often pain.
Behind silence there is sometimes shame.

This is not sentimentality. It is realism.

Heidegger helps us remember that the human being is more than what can be registered.

The Modern Triumph

We owe much to Descartes.

Modern science would hardly look the same without this search for clarity, method, and certainty. Medicine, technology, and engineering have spared millions from suffering.

We should be careful not to become ungrateful.

But every victory carries a danger.

When the world is understood as object, the next step is often control.

The forest becomes timber.
The river becomes energy production.
The body becomes mechanics.
Attention becomes a market.
The person becomes a resource.

I believe many people feel this today without having read a single page of philosophy.

They feel measured. Ranked. Optimized. Compared.

One may have a full calendar and an empty heart.

I Think, Therefore I Live?

No, experience says otherwise.

Many think much and live little.

They analyze themselves away from love.
They worry themselves away from presence.
They plan themselves away from spontaneity.
They compare themselves away from gratitude.

I do not write this from above. I believe many of us know such movements within ourselves.

Thought is a gift.

But thought can also become a cage.

Then we need philosophers who remind us that a human being is more than an inner commentator.

By the Water

I have often used nature as a background for reflection. Not as decoration, but as an aid to truth.

If one sits quietly by water early in the morning, something happens.

The light changes without asking permission.
A bird cuts through the silence.
Small waves meet the shore.
Time moves more slowly.

In such moments, the world is not an object to be studied. It is a presence in which one participates.

This is difficult to prove, but easy to experience.

And perhaps precisely for that reason, important.

Heidegger would say that truth is not only a correct statement. Truth is also unconcealment. Something comes forth. Something reveals itself.

Sometimes nature does that with us.

When People Ask About Meaning

Throughout life I have encountered many questions. Some spoken, others hidden.

Why did my life become this way?
Can I begin again?
Am I more than my failures?
Why do I still feel shame?
Is it too late?

None of these questions can be answered by mathematical certainty.

They require presence. Patience. Wisdom.

Here practical philosophy meets reality.

Descartes teaches us to think clearly.
Heidegger teaches us to listen more deeply.

Both are needed. But in the presence of suffering, it is often the listening wisdom that must come first.

The Questions of Old Age

As one grows older, the horizon changes.

When young, one often asks:

How do I succeed?
How do I become something?
How do I get ahead?

Later, other questions may arise:

Who did I become while striving?
What did I overlook?
To whom was I good?
What was truly worthy of my time?

These are not sad questions. They are mature questions.

Heidegger reminds us that mortality is not only the end of life. It also gives life seriousness and radiance.

We are not here forever.

That is why the day matters.

That is why words matter.

That is why the way we meet one another matters.

Between Two Voices

I do not wish to reject Descartes.

We still need people who ask critically. Who refuse deception. Who demand reasons. Who seek clarity in an age full of fog.

But we also need Heidegger.

We need someone to remind us that a person may know much and still be lost.

That one may master the world and lose oneself.

That one may own many things and still lack a home.

Perhaps Practical Philosophy Begins Here

Not when we can quote great thinkers.

But when we dare to ask the real questions:

How am I living now?
What is busyness doing to me?
Whom do I owe a phone call?
What have I treated as important that is not important?
What do I truly long for?
What kind of person am I becoming?

No algorithm can fully answer such questions.

They must be lived.

Closing Reflection

Descartes gave us the words:

I think, therefore I am.

Heidegger may answer more quietly:

You are long before you say it.

You are in a language you did not create.
You are in relationships that formed you.
You are in time that cannot be stopped.
You are in responsibility.
You are in possibility.
You are on the way.

And perhaps that is enough for an early morning:

To think clearly.
To live truthfully.
To be present.

No philosopher can promise us more than that.

— Kaare Pettersen
Practical Philosophy at First Light

References

Descartes, R. (1996). Meditations on first philosophy (J. Cottingham, Trans.). Cambridge University Press. (Original work published 1641)

Heidegger, M. (1962). Being and time (J. Macquarrie & E. Robinson, Trans.). Harper & Row. (Original work published 1927)

Heidegger, M. (2006). Gesamtausgabe Band 23: Geschichte der Philosophie von Thomas von Aquin bis Kant. Vittorio Klostermann.

Inwood, M. (1999). A Heidegger dictionary. Blackwell.

Polt, R. (1999). Heidegger: An introduction. Cornell University Press.

Wrathall, M. A. (Ed.). (2013). The Cambridge companion to Heidegger’s Being and Time. Cambridge University Press.

This text was written and developed in a conversation with OpenAI/ChatGPT

Martin Buber and the Encounter

Where Life Becomes Real

There are moments when life becomes more real.

Not necessarily because something great happens. Not because we experience a dramatic event, a religious revelation, or a philosophical insight that changes everything. It can happen quietly. In a conversation. In a glance. In a hand gently placed over another. In a human being who, for a moment, is not assessed, analyzed, explained, or used, but encountered.

Martin Buber is one of the great thinkers of such moments.

He is especially known for his distinction between I–It and I–Thou. At first encounter, this may sound simple. But it contains one of the deepest insights in modern practical philosophy: the human being does not live only within the self. The human being comes into being in relation.

We can relate to the world as It.

Then we examine, use, categorize, measure, explain, and control. This is necessary. Without the I–It relation, we could not build houses, conduct research, organize societies, make diagnoses, create systems, or act effectively.

But life does not become fully real there.

It becomes real in I–Thou.

When the other is no longer merely an object of my knowledge, my usefulness, my desire, my concern, or my judgment. When the other is allowed to appear as a presence. As one who meets me. As one I do not own. As one I cannot reduce to my concepts.

For Buber, this is not merely a theory of communication.

It is a philosophy of life.

I–It

I–It is not wrong in itself.

That is important to say at the beginning. Buber does not condemn knowledge, analysis, or practical use. We need the world of It. A human being must be able to understand, distinguish, plan, and act. A physician must be able to make a diagnosis. A social worker must be able to read case documents. A teacher must be able to assess work. A researcher must be able to analyze data.

The problem arises when I–It becomes the whole way we meet the world.

Then the human being is reduced to something we handle.

The other becomes a case.

A service user.

A client.

A patient.

A pupil.

A function.

A role.

A problem.

A resource.

A burden.

Nature, too, can become It. It becomes raw material, scenery, property, recreational area, energy source, or climate data. All of this may be true at one level, but it is not the whole truth.

We can also turn ourselves into It.

Then we observe ourselves from the outside. We measure performance, health, status, appearance, productivity, and value. We become a project we must constantly improve.

In this way, a human being can lose contact with their own life.

They may know much about themselves, yet no longer dwell within themselves.

I–Thou

I–Thou is something else.

In the I–Thou encounter, I do not stand before an object, but before a presence. The other is not merely something I look at. The other also looks at me. Not necessarily with the eyes alone, but with their existence.

A Thou may be a human being.

But for Buber, a Thou may also be experienced in the encounter with nature, a work of art, an animal, or God. The decisive point is not the category, but the quality of the encounter.

I–Thou is marked by presence.

By openness.

By mutuality.

By a form of respect that goes deeper than politeness.

The other is allowed to be more than my understanding.

This is crucial. For as soon as I believe that I know everything about the other, the encounter begins to close. I no longer see the other. I see my own interpretation.

Buber’s thought is therefore close to hermeneutics. It reminds us that understanding must always be humble. The other is always more.

The Encounter as an Art of Living

Why does Buber belong in a series on the art of living?

Because he shows that the good life is not lived alone.

Many modern forms of the art of living concern the inner life of the individual. How do I find peace? How do I develop myself? How do I become more attentive, free, whole, authentic, or happy?

These are important questions. But Buber reminds us that the human being cannot fulfill their humanity alone.

We become human in the encounter.

The child comes into being in the gaze of the adult.

The student dares to think in meeting a teacher who believes that thinking is possible.

The wounded person may begin to find themselves again when another human being is able to remain present.

The old person may feel dignity when someone sees not only aging, but the human being.

Love does not live in self-absorption, but in turning toward the other.

The art of living is therefore not only self-care.

It is the art of encounter.

All Real Life Is Meeting

Buber wrote that all real life is meeting.

It is one of those sentences that may sound beautiful, but becomes dangerous if taken seriously.

For then we must ask:

How often do we actually meet one another?

How often are we merely together without being present?

How often do we speak to one another without listening?

How often do we respond to what we think the other means before the other has been allowed to appear?

How often do we turn the other into a confirmation of our own assumptions?

The encounter requires something of us.

It requires attention.

It requires time.

It requires a form of inner stillness.

It requires the courage to let the other be different.

This last point may be the most difficult. We often want the other to fit into our categories. Then the world becomes safer. But a real encounter can disturb us. It can correct us. It can open something we did not control.

A Thou is never entirely harmless.

For a Thou can change me.

Buber and the Dalai Lama

In this series, the Dalai Lama has already appeared as an important voice for compassion. It is interesting to read Buber alongside him.

The Dalai Lama often speaks of how the human being finds peace by becoming less trapped in the ego and more open to the suffering of others. Compassion is not an addition to the good life. It is the very path out of self-absorption.

Buber says something similar, but from another tradition.

I do not become myself by closing myself within myself.

I become myself in relation to Thou.

Both challenge the idea that the human being is first of all an isolated self that may then choose to relate to others. For both, relation is fundamental.

The humble I is not a weak I.

It is an I that has stopped making itself the center of the world.

In meeting the Dalai Lama, Buber becomes warmer.

In meeting Buber, the Dalai Lama’s compassion becomes more dialogical.

Together they remind us that love is not primarily a feeling, but a way of being turned toward the world.

Buber and Thich Nhat Hanh

Thich Nhat Hanh taught us deep listening.

Buber helps us understand why deep listening matters so much.

To listen deeply is not merely a technique for better communication. It is to give the other the possibility of appearing as Thou. It is to set aside the need to control the conversation. It is to be present without immediately grasping, explaining, or correcting.

In professional contexts, this can be decisive.

A person may have been interviewed, assessed, diagnosed, and documented many times, yet never truly encountered. They have been the object of attention, but not necessarily the recipient of presence.

Buber would remind us of the difference.

One can speak with a human being as It.

And one can be silent with a human being as Thou.

The latter may sometimes be more healing than the former.

Buber and Social Work

Buber’s thought has great significance for social work, therapy, teaching, and care.

Professional work needs systems. It needs laws, methods, records, assessments, and decisions. All of this belongs to the I–It world, and it cannot simply be rejected.

But if professional work becomes only I–It, it becomes inhuman.

Then the relationship becomes technique.

The conversation becomes assessment.

The human being becomes a case.

Care becomes an intervention.

Help becomes administration.

Buber reminds us that the professional must never forget the Thou dimension. Even when we must assess, document, and decide, we must try to preserve the humanity of the encounter.

The other is not only a bearer of needs.

Not only a recipient of services.

Not only a risk.

Not only a history.

The other is a Thou.

This does not mean that professional boundaries disappear. On the contrary. A true encounter also requires respect for boundaries. But boundaries should protect the encounter, not replace it.

The Encounter with the Child

In work with children, Buber’s insight becomes especially important.

The child is vulnerable to the gaze of the adult. The child can be turned into a problem, a symptom, a case, a deviation, or a concern. But the child can also be met as Thou.

This does not mean that the child should be idealized or that the adult should give up responsibility. Children need adults who see, understand, protect, and act. But they also need adults who do not reduce them to what they have experienced, done, or struggled with.

A child who has been exposed to violence, abuse, or neglect is not only a traumatized child.

It is a child.

A living Thou.

With possibilities, boundaries, fear, hope, silence, play, and dignity.

If the adult sees only the injury, the child may become trapped in the injury. If the adult sees only the theory, the child may disappear behind the theory. If the adult encounters the child as Thou, something else may become possible.

The child may experience:

I am more than what has happened to me.

Love and Distance

Buber is not sentimental.

I–Thou does not mean that we should merge with the other. An encounter requires both nearness and distance.

If I absorb the other, it is no longer a Thou. Then I make the other part of myself. If I keep the other entirely at a distance, the other becomes an It.

The real encounter exists in the living tension between nearness and difference.

I stand before you.

You stand before me.

We are not the same.

But we are present to one another.

This is also the difficult art of love. To love another human being is not to own them. It is to let them be real. It is to endure that the other is not merely an extension of my wishes, needs, or stories.

The language of love is therefore not: You are mine.

It is rather: You may be Thou.

The Encounter with Nature

Buber also opens the possibility that nature may be encountered as Thou.

This is important in the series The Art of Living, because nature has gradually come to occupy a stronger place. Laozi, Schweitzer, Francis of Assisi, and your own experiences from forest, water, and soil all point toward an art of living in which the human being does not stand outside nature, but belongs within it.

One can meet a tree as It.

Then it can be measured, cut down, classified, or photographed.

But one can also, for a moment, experience the tree as Thou.

Not because the tree becomes human.

Not because we romanticize nature.

But because we stop reducing the living to function.

The one who walks in the forest and feels a kinship with the trees knows something of this. It is not necessarily a theory. It is an experience. The forest is not merely surroundings. It is presence.

In this way, Buber can help us give language to our belonging to nature.

Nature is not only It.

It can also meet us.

God as the Eternal Thou

For Buber, the I–Thou relation also has a religious depth. God is the eternal Thou.

This can be understood in different ways. For some, it is a clearly theological thought. For others, it may be read more openly: that every real relation points beyond itself. In the deepest encounter, there is a dimension of mystery.

When I truly meet another human being, I meet something I cannot own.

When I truly meet nature, I meet something I have not created.

When I truly meet life, I meet something that exceeds me.

Buber therefore helps us see that the art of living is not merely about techniques for a better life. It is also about reverence for what cannot be controlled.

Here he stands close to Schweitzer.

Reverence for life and the I–Thou encounter arise from the same basic feeling: the living is more than my use of it.

When the Encounter Fails

There is also pain in Buber’s philosophy.

For not all encounters become real.

Sometimes we try to meet, but the other is not available.

Sometimes we ourselves are turned into It.

Sometimes love becomes control.

Care becomes power.

Conversation becomes strategy.

Religion becomes system.

Profession becomes administration.

Then a form of loneliness arises that is not only about being alone. One can be surrounded by people and still not be met.

This is one of the great wounds of our time.

Many are visible, but not encountered.

Registered, but not understood.

Connected, but not near.

Buber therefore becomes increasingly relevant. In an age of digital communication, rapid reactions, and constant evaluation of one another, he reminds us of something slow and demanding:

The other cannot be encountered in haste.

AI and the Real Encounter

In our time, a new question arises: Can artificial intelligence be a Thou?

It is understandable that conversations with AI may feel meaningful. They can help us think, formulate, remember, structure, and reflect. They can give language to experiences for which we ourselves cannot find words.

But Buber’s distinction helps us be precise.

AI can be useful in the I–It world. It can be a conversational tool, a mirror, a writing partner, a support for reflection. It can simulate dialogue.

But it does not live.

It does not die.

It does not love.

It does not carry a body.

It does not share a lived life.

Therefore, AI cannot be a Thou in the same way that a human being can.

The dead can live on in us because they have been part of our lives. They have touched us. They have shaped our body, our language, our memories, and our love. AI can help us speak about this, but it does not live on in us in the same way.

This is an important boundary.

A conversation may be useful without being a real encounter in Buber’s sense.

Living More Dialogically

What, then, does it mean to live more dialogically?

It does not mean having more conversations.

It does not mean being social all the time.

It does not mean liking everyone.

It means practicing meeting the world less as object and more as presence.

It can begin simply.

Listening a little longer before responding.

Seeing the human being behind the role.

Letting the child be more than the problem.

Letting the old person be more than old age.

Letting nature be more than resource.

Letting the dead be more than past.

Letting oneself be more than a project.

This is the art of living.

Not dramatic.

Not always visible.

But deeply human.

Conclusion

Martin Buber brings relation into The Art of Living.

Lönnebo taught us the wisdom of the heart.

The Dalai Lama taught us the path of compassion.

Dzogchen taught us the open space of presence.

Laozi taught us not to push the river.

Tai Chi taught us that wisdom can become movement.

The Stoics taught us to meet life as it is.

Thich Nhat Hanh taught us to come home to everyday life.

Frankl taught us that life asks us questions.

Schweitzer taught us reverence for all living things.

Buber teaches us that life becomes real in the encounter.

Not in control.

Not in use.

Not in the category.

Not in the system alone.

But in the moment when an I stands before a Thou and allows the other to be real.

Perhaps this is one of the simplest and most difficult forms of the art of living:

To meet a human being, a tree, a child, a beloved, a stranger, the dead, a living creature, without immediately turning it into something we own, use, or fully understand.

All real life is meeting.

And perhaps a true life begins precisely there.

All real life is meeting.

Author’s Note

This essay is part of the series The Art of Living, in which Eastern and Western wisdom traditions are brought into conversation with practical philosophy. Martin Buber’s philosophy of dialogue is read here as an art of living: a practice of meeting human beings, nature, and life itself as Thou, not only as It. This text was written in a conversation with OpenAI/ChatGPT.