Kierkegaard: The Principle of Existence against the System
This text is a preview of History of the Reception of Hegel, volume I, to be published in 2026 by Reflexivity Press.
The Immanent Critique and Its Radicality
Søren Kierkegaard (1813–1855) developed the most radical critique of Hegel’s systematic claim. His critique was directed not merely against particular contents, but against the very possibility of a systematic logic when it comes to human existence. Kierkegaard’s Concluding Unscientific Postscript to Philosophical Fragments (1846) shows a precise knowledge of Hegelian logic. His critique is immanent, not external. He understands Hegel’s system better than many of its defenders — and precisely for this reason he is able to show its systematic limit.
The central thesis reads: “Logic and existence do not correspond to one another.”[1] Systematic logic fails to grasp what really matters — the concrete, temporal, suffering existence of the individual human being. The system can grasp the universal, but not the individual. It can grasp the necessary, but not the possible. It can grasp the eternal, but not the temporal. “The individual” became Kierkegaard’s central category against Hegel’s “universality.” The concrete human being in his irreplaceable situation cannot be dissolved into the universality of the concept. “The universal does not exist, only the individual exists.”[2]
What does existence mean for Kierkegaard? First of all, it is temporality: the existing individual is in becoming, not in finished being. Past, present, and future are existential structures, not logical categories. It is singularity: every individual is unique, irreplaceable, irreducible. It is not “an instance of something,” but this One. It is passion: the existential truths — anxiety, despair, love, faith — are not conceptual but passional. They are lived, not thought. It is decision: existence takes place in decisions that cannot be derived from premises. The decision is a leap, not a mediation.
Leap versus Mediation – And Existential Truth
Kierkegaard’s “leap” — especially the “leap into faith” — became the antithesis of Hegelian mediation. Faith is not the result of rational reflection, but the paradox: “Faith is precisely this paradox, that inwardness is higher than outwardness.”[3] The existential truth reads: “Truth is subjectivity”[4] — not meant as relativistic subjectivism, but as the thesis that truth can only be found in concrete lived enactment. Objective truth, like logic, is irrelevant for the existing individual. What good does it do me to know what the universal is, if I do not know who I am?
The existing individual is temporally constituted — past, present, and future are not logical categories but existential structures. Anxiety is anxiety before possibility, before the future, not before the actual. Guilt is entanglement in the past, not logical contradiction. The decision happens in the present, not in the timeless space of concepts. Hegel is said to have tried to dissolve time into logic — but time cannot be sublated. Existence is essentially temporal. The system, by contrast, is essentially timeless. That is why the system cannot grasp existence.
What Hegel Actually Says: The Individual in the U-P-I Structure
Kierkegaard’s fundamental accusation: the system grasps the universal but not the individual. The concrete human being vanishes into abstraction. But Hegel develops the U-P-I structure — universal, particular, individual — precisely as a structure that grasps all three moments in their reciprocal relation. For Hegel, the individual is not the abstract atom, as it is for the nominalists or for Stirner, but the concretely determined.[5]
Hegel’s concept of the “individual” is used differently in different contexts. On the one hand, the “individual” in the traditional logical sense — the individual as “an instance of,” as an instantiation of a genus. On the other hand, the individual as the concrete presentation of the concept, in which universality and particularity are mediated. This second meaning is decisive: this human being here — with this history, this language, this body, this biography — cannot be derived from universal concepts. Every individual is, in this respect, contingent, factual, not deducible. But the individual also does not contradict its universalities and particularities.
The individual bears within itself the universal — humanity, reason, language, morality — and the particular — culture, nation, epoch, social position — not as an external ascription, but as constitutive moments of its self. The human being is not first a “naked individual” to which social determinations are then added; rather, he constitutes himself as an individual precisely through these mediations. In our interpretation of Hegel this is made explicit: every individual is the concrete unity of U-P-I. The universalities — language, reason, social forms, legal structures — and the particularities — cultural imprint, historical situation, national identity — are present in every individual, not as external determinations, but as moments of its self-determination. The individual appropriates the universal — not as submission to abstract norms, but as self-determined concretization of the universal in its particular situation.
An example makes this clear: the German language is universal — all German speakers share it. But each speaker speaks it in a particular way — dialect, style, idiolect. And every concrete utterance is individual — this sentence, here and now. The individual, the concrete utterance, is not “merely” an instance of the universal, but the living realization that at once preserves, individualizes, and carries forward the universal. Without the universal — the language — there would be no individual utterance. Without the individual — the concrete use — the universal would be dead. Mediation is constitutive for both sides.
The Facticity of Existence and the Three Circles
The facticity of existence — that this human being exists here, with this history, this body, this situation — is not logically derivable. Hegel himself takes this into account through the distinction between logic and real philosophy. Logic explicates structures — real philosophy shows their contingent realization. That the world exists, that this human being exists, is not logically derivable. Logic only shows how we can understand what exists in its structure.[6]
In our interpretation this is made explicit through the three circles.[7] The performative circle shows: the starting point is the enactment of action, which is always already presupposed — an insight we take from Johannes Heinrichs. Whoever thinks is already acting. Whoever argues is already carrying out a practice. The chronological circle captures the temporal genesis, how something has factually developed. The systematic circle explicates the logical structure, how something can be thought. These three are distinct — but they are not unrelated. They converge in enactment without being identical.
The existential structures that Kierkegaard thematizes — anxiety, despair, decision — are not “instances of something.” That is correct. But neither are they structureless. Anxiety has a structure: anxiety before possibility, not before actuality. Despair has a structure: despair over the self one does not want to be, or wants to be but is not. Decision has a structure: leap as non-derivability from premises, but not as arbitrariness. Kierkegaard shows these structures — and at the same time claims that they cannot be grasped structurally. That is the performative contradiction of his position.
The Performative Contradiction and the Legitimate Insight
The systematic point is this: Kierkegaard shows structural features of existence — and at the same time claims that these cannot be grasped structurally. He writes systematic works about the impossibility of the system. He formulates universal statements about the unsayability of the individual. He argues with concepts against the possibility of conceptual grasp. This is a performative contradiction. Whoever formulates his critique systematically and puts it forward with a claim to universality enacts what he denies: the mediability of the individual with the universal, the possibility of rational grasp of structure, the communicability of existential insights.
Kierkegaard might reply: “I am only showing the limit of the system by pointing it out systematically.” But then the limit itself is systematically graspable — and thus no longer an absolute limit. Logic can think its own limit — that is precisely its distinguishing feature. In our interpretation this shows itself: logic knows its own limitedness and therefore compels the transition to real philosophy.[8]
The legitimate insight is precise: there is an irreducible singularity to concrete existence. The individual is not fully subsumable under universal concepts. The existential structures — anxiety, despair, love, decision, death — are not “instances of something,” but irreplaceable reality. The system can speak about them, but it cannot replace them. The temporal structure of existence is real. The existing individual is not in finished being, but in becoming. The past is not sublated in the sense of being “settled,” but shapes the present. The future is open, not determined. This temporality withdraws, in a certain sense, from timeless logic — but it does not withdraw from being grasped structurally.
The absolutization is equally clear. Kierkegaard makes existence absolute — and thereby inaccessible to any rational mediation. The leap into faith becomes an absurdity — precisely because it is paradoxical, precisely because it is unreasonable, it is supposed to be existentially true. “Credo quia absurdum” — I believe because it is absurd. This is not a critique of reason, but its negation. The question is not: system or existence? Logic or leap? Universal or individual? But rather: how are the two mediated? Kierkegaard poses the question as though there were only the alternative: either the individual dissolves into the system, and is thereby lost, or the individual stands absolutely outside it, and is thereby incommensurable. The dialectical answer runs: the individual constitutes itself through mediation with the universal, without being dissolved into it.
Søren Kierkegaard: Concluding Unscientific Postscript to Philosophical Fragments (1846), trans. H.M. Junghans, Düsseldorf 1957, p. 267. ↩︎
Kierkegaard: Concluding Unscientific Postscript, p. 270. ↩︎
Kierkegaard: Concluding Unscientific Postscript, p. 164. ↩︎
Kierkegaard: Concluding Unscientific Postscript, p. 164. ↩︎
Hegel: Science of Logic II, Werke 6, pp. 273–301 (The Judgment of the Concept). ↩︎
Hegel’s Science of Logic (in preparation), Ch. 25 and Hegel’s Science of Logic (in preparation), Ch. 24.1. ↩︎
Hegel’s Science of Logic (in preparation), Ch. 25. ↩︎
Hegel’s Science of Logic (in preparation), Ch. 23.5, The Logically Bounded Absoluteness, 24.5 (The Limit of Logic). ↩︎