Being, Time & the Question of Existence
Dasein · Being-in-the-World · Temporality · The Question Concerning Technology
Martin Heidegger (1889–1976) was a German philosopher widely regarded as one of the most important — and controversial — thinkers of the twentieth century. Born in Meßkirch, Baden, he began training for the Catholic priesthood before turning to philosophy at the University of Freiburg, where he studied under Edmund Husserl, the founder of phenomenology.
Heidegger's central question was deceptively simple: What does it mean to be? He argued that Western philosophy had forgotten this question since the pre-Socratics, substituting theories of beings for an inquiry into Being itself. His 1927 masterwork Being and Time transformed phenomenology into an investigation of human existence — of Dasein, the being for whom Being is always at stake.
Dasein · Being-in-the-world · Ready-to-hand / Present-at-hand · Thrownness · Being-toward-death · The They (das Man) · Unconcealment (aletheia) · Gestell (enframing) · The Fourfold · Language as the house of Being
Heidegger joined the Nazi party in 1933 and served briefly as rector of Freiburg University. Though he resigned the rectorship in 1934, he never publicly repudiated National Socialism. This moral failure remains inseparable from any assessment of his work, even as his philosophical contributions continue to shape contemporary thought.
Heidegger's term for human existence is Dasein — literally "being-there." We are not subjects observing a world of objects; we are the beings for whom Being itself is an issue.
Dasein is always mine (Jemeinigkeit): I cannot transfer my existence to another. And Dasein is always already in a world, engaged with things, with others, with its own possibilities. Existence precedes any theoretical stance.
"The essence of Dasein lies in its existence."
— Being and Time, §9Heidegger rejects the Cartesian picture of a mind "inside" a body looking "out" at a world. Being-in-the-world (In-der-Welt-sein) is a unitary structure: we do not first exist and then relate to a world. We are always already embedded, practically engaged, and attuned.
The world is not a container of objects but a web of significance — a referential totality in which things show up as meaningful because of our purposes, projects, and concerns. The hammer is "for hammering," the door "for entering."
Three moments: worldhood (the structure of significance), who is in the world (Dasein, with others), and Being-in as such (attunement, understanding, discourse).
Our primary relation to things is practical. The tool in use withdraws — we don't notice the hammer, we notice the nail going in. Equipment forms a referential network: hammer, nails, boards, house, dwelling. Things are transparent when they work.
Only when equipment breaks down does it become an object of theoretical contemplation. The broken hammer is suddenly there as a thing with properties. Science studies the present-at-hand — but this is a derivative mode, not the primary one.
Conspicuousness (malfunction) · Obtrusiveness (missing tool) · Obstinacy (obstacle). Each progressively strips away the referential context and reveals the thing "as such."
For Heidegger, time is not a sequence of "now-points" but the deepest structure of Dasein's existence. Dasein is its temporality. The three ecstases of time correspond to the three moments of care.
Dasein anticipates its ownmost possibility (death), retrieves its thrown heritage, and acts resolutely in the moment. The future has primacy: I am what I am going to be.
Clock time, "now-time," the endless sequence of present moments. Dasein loses itself in busyness, treats time as something to be "spent" or "killed." The public time of "the They."
Dasein is always already absorbed in the anonymous public — "the They" (das Man). We do what "one" does, think what "one" thinks, feel what "one" feels. This is not a moral failing but a structural feature of being human.
Idle talk (Gerede) — language unmoored from genuine understanding;
we pass along what "they say" without thinking.
Curiosity (Neugier) — restless pursuit of novelty for its own sake;
never lingering long enough to understand.
Ambiguity (Zweideutigkeit) — everything seems accessible and understood,
yet nothing genuinely is.
Authenticity does not mean escaping das Man but owning one's existence within the social world — choosing resolutely rather than drifting with the crowd.
Angst (anxiety) is not fear of any particular thing. It is the mood in which the world as a whole loses its significance, and Dasein confronts the uncanniness (Unheimlichkeit) of its own existence — the fact that it has no ultimate ground.
Being-toward-death is Dasein's ownmost, non-relational, certain, yet indefinite possibility. Death is not an event at the end of life but a structural feature of existence: we are always already dying. Authentic existence means anticipating death — not morbidly, but as the horizon that individualises and gives urgency to life.
"As soon as a human being is born, he is old enough to die."
— Being and Time, §48After the mid-1930s, Heidegger's thinking undergoes a fundamental shift — from the analytic of Dasein to the history of Being (Seinsgeschichte). The question is no longer "How does Dasein disclose Being?" but "How does Being give and withdraw itself across history?"
Truth is not correctness of propositions but the primordial event in which beings come forth from hiddenness into the open. Every revealing is also a concealing — truth and untruth belong together. Heidegger finds this insight in the pre-Socratics, especially Heraclitus and Parmenides.
In his later thought, Being is no longer a stable ground but an event (Ereignis) in which Being and human thinking are mutually appropriated. Being needs Dasein to be disclosed; Dasein needs Being to exist. This reciprocal belonging replaces subject-object metaphysics.
Technology is not merely a collection of instruments. Its essence is Gestell (enframing) — a mode of revealing that challenges nature to deliver energy that can be extracted, stored, distributed, and switched about.
Under enframing, everything becomes standing reserve (Bestand): the river is a hydroelectric power source, the forest is timber, the human is "human resources." Things lose their thingness; beings are reduced to calculable, optimisable units.
"Where the danger is, grows the saving power also."
— after Hölderlin, in The Question Concerning TechnologyThe saving power lies not in rejecting technology but in recognising its essence as one mode of revealing among others — and in recovering the poetic and meditative modes that let beings show themselves on their own terms.
In his later work, Heidegger develops the concept of the Fourfold (das Geviert) — the gathering of earth, sky, divinities, and mortals. To dwell is to preserve this gathering, to let things be in their essential interconnection.
The jug, the bridge, the farmhouse — genuine "things" gather the Fourfold. They are not mere objects but sites of dwelling where world comes to presence.
For the later Heidegger, language is not a tool we use to label things. Language is the primordial event in which Being comes to word. We do not speak language; language speaks us. It is "the house of Being" in which we dwell.
Poetry is the highest form of language because the poet does not impose meanings but listens to what wants to be said. Hölderlin, Rilke, Trakl — these poets "name the holy" and thereby open a space for genuine dwelling.
Thinking and poetry are neighbours: both attend to what withdraws from ordinary speech. The thinker and the poet dwell on separate mountain peaks but hear the same silence between them.
"Language is the house of Being. In its home human beings dwell."
— Letter on Humanism, 1947Husserl — phenomenological method: "to the things themselves!"
Kierkegaard — anxiety, authenticity, the individual before God
Nietzsche — nihilism, the death of God, revaluation
Aristotle — phronesis, energeia, the question of being qua being
Pre-Socratics — Heraclitus (logos, physis), Parmenides (Being and thinking)
Sartre — existentialism (though Heidegger rejected the label)
Gadamer — philosophical hermeneutics
Arendt — the human condition, natality, thinking
Derrida — deconstruction as radicalised destruction
Foucault — epistemic frameworks, the history of truth
Levinas — ethics as first philosophy (in response to Heidegger)
Merleau-Ponty — embodied phenomenology
Iain McGilchrist's account of left- and right-hemisphere attention draws deeply on Heidegger's distinction between present-at-hand (detached, analytical, left-hemisphere) and ready-to-hand (engaged, contextual, right-hemisphere). Heidegger's insight that theoretical abstraction is derivative of lived engagement anticipates McGilchrist's argument that the left hemisphere's mode of attention parasitises the right's primary openness to the world.
Roger Scruton's critique of modern architecture and his defence of beauty as a "real presence" echo Heidegger's analysis of dwelling and the Fourfold. Scruton's insistence that technology strips the world of meaning parallels Heidegger's account of Gestell. Both thinkers see the modern crisis as a loss of the sacred dimension of everyday life — a forgetting of what it means to dwell rather than merely to function.
Though Heidegger rejected the existentialist label, Being and Time made existential phenomenology possible. Sartre, Beauvoir, Merleau-Ponty, and the entire French phenomenological tradition are unthinkable without Heidegger.
Gadamer's Truth and Method extends Heidegger's hermeneutics. Derrida, Foucault, and Rorty all pass through Heidegger. His "destruction" of metaphysics becomes deconstruction; his history of Being becomes genealogy.
Deep ecology (Naess), environmental philosophy, and the critique of technological rationality all draw on Heidegger's analysis of Gestell and dwelling. His thought inspires those who seek a non-instrumental relationship with nature.
Heidegger's "Building Dwelling Thinking" has profoundly shaped architectural theory. Norberg-Schulz, Pallasmaa, and Peter Zumthor draw on his phenomenology of place. The idea that buildings should "gather" a world rather than merely enclose space is directly Heideggerian.
Heidegger connects to Nietzsche (confrontation with nihilism), Dostoevsky (anxiety and the underground), Jung (the question of meaning), Frankl (authentic existence and finitude), and Peterson (the call to individual responsibility). His critique of technology and defence of dwelling resonate with Scruton's conservatism and McGilchrist's account of hemispheric attention.
Heidegger remains one of the most cited philosophers of the twentieth century, his influence persisting across continental philosophy, theology, literary theory, ecology, and cognitive science.
The magnum opus. Analyses Dasein's existence through being-in-the-world, care, temporality, and being-toward-death. Incomplete — only the first two of three planned divisions were published — yet it transformed twentieth-century philosophy.
The inaugural Freiburg lecture. Introduces the Nothing (das Nichts) disclosed in anxiety. Provocative and brief — an ideal entry point to Heidegger's questioning of the foundations of science and logic.
Perhaps his most influential essay. Analyses the essence of modern technology as Gestell (enframing) and argues that the danger of technology lies not in machines but in a mode of revealing that reduces everything to standing reserve.
A collection including "The Origin of the Work of Art," "Building Dwelling Thinking," and "The Thing." The best introduction to Heidegger's later thought on art, dwelling, and the Fourfold. Translated by Albert Hofstadter.
Heidegger's meditations on language, poetry, and the relationship between thinking and saying. Includes the influential "A Dialogue on Language" and "The Nature of Language." Essential for understanding his claim that language is the house of Being.
The standard single-volume anthology. Includes key texts from across Heidegger's career: "On the Essence of Truth," "The Origin of the Work of Art," "Letter on Humanism," "The Question Concerning Technology," and selections from Being and Time.
"The most thought-provoking thing in our thought-provoking time is that we are still not thinking."
— M. Heidegger, What Is Called Thinking?1889 – 1976 · Meßkirch → Freiburg → Marburg → Freiburg → Todtnauberg
"Only a god can save us."