What Is the Leap of Faith?

Quick Answer

The leap of faith is the term most often associated with Soren Kierkegaard to describe the movement by which a person commits to something — paradigmatically religious faith — that cannot be justified or secured by rational argument. It is not a leap into irrationality, but a leap beyond what reason can deliver: a passionate, subjective decision made in the face of uncertainty, in which a person risks everything on a commitment that no proof can guarantee.

Kierkegaard develops the idea most famously in Fear and Trembling (1843), where he examines the biblical story of Abraham, who is commanded by God to sacrifice his son Isaac. Every ordinary ethical and rational consideration says that child sacrifice is monstrous. Yet Abraham, in Kierkegaard's reading, does not abandon his ethical life; he suspends the ethical for the sake of a higher, teleological relation to God, trusting the absurd — believing that he will receive Isaac back, that God will provide. The leap of faith names this double movement: resignation of everything one holds dear, and then a passionate trust that, against all expectation, meaning will be restored. For Kierkegaard, this is not a doctrine to be believed once but an orientation of the whole self, renewed in every moment of risk.

Definition

Strictly speaking, the "leap" (Danish Spring) is Kierkegaard's image for the transition from objective uncertainty to subjective commitment. Reason can take us to the edge of an abyss: it can show that the existence of God cannot be proven, that the paradox of the incarnation offends the understanding, that any absolute commitment outruns the evidence. But the final step — the decision to believe, to commit, to entrust oneself — is not itself a conclusion of reasoning. It is a movement of the will, made "with fear and trembling," in which the individual accepts the risk of error as inseparable from the venture.

Several features define the leap. First, it is subjective: it concerns the existing individual's relation to truth, not the detached observer's accumulation of propositions. Kierkegaard famously wrote that "truth is subjectivity" — the truth that matters is the truth for which one lives and is willing to die. Second, it is passionate: it involves the whole self, including the emotions, and cannot be performed with lukewarm half-heartedness. Third, it is paradoxical: it affirms something the understanding cannot assimilate, and in this sense it is "absurd" — not logically contradictory in a careless way, but beyond the reach of the finite understanding. Fourth, it is repeated: because the uncertainty never disappears, the leap must be made again and again; the knight of faith does not reach a plateau of certainty but lives each day in the movement of trust.

Historical Context

Kierkegaard wrote against the background of nineteenth-century Danish Lutheranism and the speculative philosophy of G.W.F. Hegel. In Hegel's system, faith could be absorbed into reason: the absolute was knowable, history was the march of the World-Spirit, and the individual was a moment in a larger conceptual whole. Kierkegaard considered this a betrayal of what it means to exist. An existing individual is always in process, always confronted with decisions that cannot be deferred until the system is complete. Against the "system," he insisted that the highest truths are appropriated subjectively, through passion and risk, not by reading a philosophical encyclopedia.

The idea of a leap also has roots in the tradition of religious reflection. Blaise Pascal's famous wager argued that reason is undecided about God and that we must bet — that not betting is itself a bet. Kierkegaard radicalized this: the wager is not merely a calculation of expected utility but a transformation of the self. He also drew on the Lutheran emphasis on justification by faith, the recognition that the sinner cannot earn salvation by works and must trust in grace. What Kierkegaard added was a psychological and existential analysis of the cost of that trust — the anxiety, the trembling, the offense that the understanding takes at the paradox.

The leap of faith became a decisive reference point for twentieth-century existentialism. While Albert Camus rejected the leap as "philosophical suicide" — an escape from the absurd into hope — other thinkers, including Karl Jaspers and Paul Tillich, developed their own versions of boundary situations and ultimate concern that preserved the Kierkegaardian insight that decisive commitment outruns proof. In the analytic tradition, philosophers of religion such as William James (in "The Will to Believe") defended a milder version of the same structure: when evidence is insufficient and the decision is forced and momentous, it is rational to commit.

Philosophical Perspectives

For Kierkegaard, the leap of faith is inseparable from his analysis of the stages of existence. In Either/Or he contrasts the aesthetic stage — the pursuit of pleasure and possibility, which ends in despair because nothing finite satisfies — with the ethical stage, the commitment to duty and marriage and responsible life, which nevertheless cannot ground itself. The leap of faith is the movement to the religious stage, in which the individual, having reached the limit of both pleasure and ethical self-sufficiency, surrenders to God. Crucially, the leap is not the discovery of a new piece of knowledge but the reorganization of the self around a passion: the "knight of infinite resignation" gives up the finite world, while the "knight of faith" receives it back transformed, living in the world as though ordinary while inwardly oriented to the absolute.

The relation between faith and reason in Kierkegaard is therefore not simple opposition. Reason has an indispensable role: it must be used rigorously to see that the object of faith transcends it. The paradox "offends" the understanding, and this offense is the sign that we have reached the boundary of the conceptual. Faith begins where thought, in honest reflection on its own limits, discovers that it cannot complete itself. Kierkegaard compares the paradox to a mountain that the understanding cannot climb; the leap is the decision to live on the other side without the map. This is why he says that faith is not knowledge, not the result of demonstration, but "an objective uncertainty held fast in an appropriation-process of the most passionate inwardness."

Critics have worried that the leap licenses irrationality. Kierkegaard's rejoinder is that the alternative — waiting for certainty before committing — is not more rational but self-deceiving, because it is actually a refusal to exist. Every human being already lives by commitments that outrun proof: love, trust, vocation, friendship. The leap of faith makes explicit what all serious life already involves: the risk of being wrong, taken with full awareness and full passion. Modern commentators such as Alastair Hannay and C. Stephen Evans have defended this reading, arguing that Kierkegaard offers not irrationalism but a critique of the idolatry of the understanding — a claim that reason's own limits are part of the human condition and that the highest life acknowledges them.

Different Traditions Comparison

The leap of faith is often contrasted with the absurd hero of absurdism. Camus, in The Myth of Sisyphus, treats Kierkegaard's leap as an attempt to escape the absurd: when the human demand for meaning meets a silent universe, Kierkegaard chooses to hope for a transcendent meaning, and Camus calls this "philosophical suicide." The absurd hero, by contrast, accepts that there is no resolution and continues to live lucidly within the contradiction, like Sisyphus rolling his stone without expecting the summit to stay. Where Kierkegaard leaps, Camus stays; where Kierkegaard finds meaning in the absurd relationship with God, Camus finds dignity in rebellion without God.

In the religious traditions beyond Christianity, analogues of the leap appear. Islamic theology has long debated the relation between faith (iman) and reason, with figures like al-Ghazali defending the priority of the heart's certainty over discursive proof. In Jewish thought, the leap resonates with the demand for trust (emunah) in a covenant that precedes understanding, and with the Hasidic emphasis on the sincerity of the whole heart. In Eastern traditions, the structure appears differently: Zen Buddhism's insistence that enlightenment is not an inference but an immediate, non-conceptual awakening resembles the leap in its rejection of the sufficiency of concepts, though it aims not at theistic trust but at direct realization. The existentialist tradition, however, gives the leap its most distinctive modern form by making the individual's passionate choice, rather than any institutional doctrine, the locus of truth.

Modern Reflection

The leap of faith remains one of the most contested and generative ideas in existentialist thought. In psychology, Viktor Frankl's logotherapy echoes its structure: meaning cannot be deduced from circumstances, only chosen, and the capacity to choose meaning in suffering is the specifically human act. In philosophy of religion, debates about "Reformed epistemology" and "fideism" still orbit the question of whether religious belief requires evidence or whether a properly basic trust is rational. In popular culture, the phrase has drifted far from Kierkegaard — it now names any risky, unjustified commitment, from a career change to a marriage proposal — but even this drift preserves the core insight that some of the most important decisions of life cannot be underwritten by guarantees.

At the same time, the leap has been sharply criticized. Secular existentialists such as Sartre and Camus saw in it a flight from freedom into comforting illusion; analytic philosophers have objected that a belief cannot simply be willed into existence, and that treating "commitment" as a substitute for evidence confuses decision with cognition. Feminist and social critics add that the ideal of the solitary knight of faith underestimates how much of our believing is formed by community, tradition, and power. These objections do not destroy the concept; they refine it. The question Kierkegaard posed — what it means to live a truth that cannot be proven, and to do so with passion and integrity — remains as urgent as ever in an age of uncertainty, information overload, and the collapse of inherited certainties. Whether one leaps or stays, the leap of faith forces us to say clearly what we are living for and what we are willing to risk.

Related Thinkers

• Soren Kierkegaard — author of Fear and Trembling and Either/Or, who gave the leap of faith its classic formulation as passionate commitment beyond reason
• Albert Camus — rejected the leap as "philosophical suicide," preferring the lucid acceptance of the absurd and the image of Sisyphus
• Friedrich Nietzsche — his proclamation of the death of God frames the modern problem to which the leap of faith is one radical response

Related Quotes

• "Faith is precisely the contradiction between the infinite passion of inwardness and objective uncertainty." — Soren Kierkegaard
• "He who loves God without faith reflects upon himself; he who loves God in faith reflects upon God." — Soren Kierkegaard
• "One must imagine Sisyphus happy." — Albert Camus (contrast: lucidity without the leap)

Further Learning

To deepen your understanding of the leap of faith, explore these connected resources in the ZHAIBIAN archive:

• Kierkegaard — the full thinker entry on the father of existentialism
• Fear and Trembling — the book in which the leap of faith is most vividly dramatized
• Faith — the wisdom entry on trust, risk, and commitment
• Camus vs. Kierkegaard — how the absurdist and the Christian existentialist diverge at the moment of the leap
• Existentialism — the philosophy entry on the movement Kierkegaard founded

Sources

• Stanford Encyclopedia of Philosophy, "Søren Kierkegaard" — https://plato.stanford.edu/entries/kierkegaard/
• Internet Encyclopedia of Philosophy, "Søren Kierkegaard (1813–1855)" — https://iep.utm.edu/kierkega/
• Stanford Encyclopedia of Philosophy, "Faith" — https://plato.stanford.edu/entries/faith/