What Is Metaphysics?

Overview

About twenty-five pages, Martin Heidegger’s inaugural lecture as professor at Freiburg, delivered in 1929. Where an inaugural lecture typically surveys a new professor’s field respectfully for an assembled academic audience, Heidegger instead used the occasion to pose a question the sciences’ own methods cannot answer: beginning from the observation that the sciences deal only with beings and, beyond that, with nothing, he asks directly what this nothing actually is.

Heidegger argues that the nothing cannot be reached through logic alone, since logical negation always presupposes something already given to negate, but is instead revealed concretely in the specific mood of anxiety, a state in which beings as a whole slip away from their usual significance and we find ourselves held out into nothing. This experience, he argues, is what makes it possible to ask about Being at all, and the lecture closes by restating what he considers metaphysics’s single most fundamental question, why are there beings at all and not rather nothing.

What happens

The sciences and their implicit nothing. Heidegger begins from the observation that the sciences, in their ordinary practice, deal only with beings and, beyond that, with nothing else, an assumption so basic to scientific method that it typically goes unexamined, and he asks directly what this nothing that the sciences implicitly set aside actually is.

Why logic cannot reach the nothing. Heidegger argues that the nothing cannot be approached through logical negation, since any logical denial of something already presupposes that something as given, meaning logic can only ever negate particular beings rather than genuinely grasping nothing as such.

Anxiety as the disclosure of the nothing. Rather than a logical approach, Heidegger argues that the nothing reveals itself concretely through the specific mood of anxiety, a state distinct from ordinary fear of some particular thing, in which beings as a whole slip away from their usual meaningful context and we find ourselves held out directly into nothing.

The nothing as the condition for questioning Being. Heidegger argues that this experience of anxiety and the nothing is what actually makes it possible to ask about Being at all, since only by confronting beings as a whole receding into insignificance can a questioner step back from any particular being to ask the more fundamental question of what it means for anything whatsoever to be.

Metaphysics as questioning beyond beings. Heidegger characterizes metaphysics itself as precisely this kind of questioning that goes beyond particular beings toward the more fundamental question of Being, positioning his own lecture as an example of the metaphysical inquiry it describes rather than merely a description of it from outside.

The closing restatement. The lecture closes by restating what Heidegger considers metaphysics’s single most fundamental question, why are there beings at all and not rather nothing, transforming the lecture’s unusual opening provocation about scientific method into a genuinely foundational philosophical inquiry.

How to read it

Read Heidegger’s turn from the sciences’ implicit assumption about beings and nothing as a deliberate provocation aimed at an inaugural academic audience; beginning from ordinary scientific practice and pushing toward a question science’s own methods cannot address makes the lecture’s philosophical ambition immediately clear from its opening moves.

Pay close attention to why Heidegger insists logic cannot reach the nothing, since logical negation always presupposes something already given; this argument is central to understanding why he turns instead to mood and lived experience as the genuine access point to the question he is pursuing.

Notice how carefully Heidegger distinguishes the specific mood of anxiety from ordinary fear of some particular threatening thing; anxiety’s object, if it can even be called an object, is beings as a whole slipping away rather than any specific danger, a distinction crucial to his entire argument.

Consider how directly this lecture connects to Heidegger’s broader philosophical project, particularly his earlier treatment of anxiety and finitude in Being and Time; the lecture applies and extends concepts developed there to the more specifically metaphysical question of nothing and Being.

Read this lecture alongside Sartre’s Being and Nothingness to compare how two major twentieth-century philosophers, working in related but distinct traditions, treated nothingness as a genuine philosophical subject rather than a merely negative absence unworthy of serious inquiry.

Questions it raises

• Does Heidegger’s argument that logic cannot reach the nothing, since negation always presupposes something already given, hold up as a genuine philosophical limitation, or does it reflect a specific and perhaps contestable understanding of how logical negation actually works?
• How persuasive is Heidegger’s claim that anxiety specifically, rather than some other mood or experience, is what discloses the nothing? Could a different emotional or experiential state accomplish the same philosophical work, or does anxiety have some distinctive structure that makes it uniquely suited to this disclosure?
• What does Heidegger’s choice to deliver this kind of radically questioning lecture as his inaugural address suggest about his own understanding of philosophy’s proper relationship to the sciences and to conventional academic expectation? Was this a provocation, a genuine philosophical necessity, or both?
• How does the lecture’s closing question, why are there beings at all and not rather nothing, function differently from more conventional metaphysical questions about the nature or cause of particular beings? Does reframing the fundamental question this way actually open new philosophical possibilities?
• Given that this lecture begins from and responds directly to the sciences’ own implicit assumptions, what does it suggest about the proper relationship between scientific and philosophical inquiry? Is Heidegger arguing philosophy should correct science, or that the two pursue genuinely different, non-competing questions?
• How does Heidegger’s treatment of anxiety here relate to your own understanding of that experience? Does his philosophical account of anxiety as revealing something significant about existence match or diverge from more everyday or psychological understandings of what anxiety actually is and does?