Existentialism and Religion

Quick Answer

The relation between existentialism and religion is one of the defining tensions of the movement. Existentialism began, in Kierkegaard's authorship, as a defense of religious faith — but of a faith so demanding, so personal, and so resistant to institutional domestication that it scandalized both the church and the philosophical establishment. The tradition then bifurcated. One branch, represented by Kierkegaard's heirs in Protestant and Catholic theology and in Jewish religious philosophy, used existentialist analysis to revitalize religion: faith is not assent to propositions but a passionate relation of the whole self; anxiety is not the enemy of faith but its threshold; God is not a hypothesis but the ground of our being. The other branch, represented above all by Sartre and, in a different register, by Camus, drew the opposite conclusion: if existentialism is true, there is no God, and human beings must bear the full weight of freedom and meaning-making alone.

What unites the two branches is a shared diagnosis of the modern condition. Both agree that the traditional supports of religious life — church authority, systematic theology, cultural Christianity — have collapsed or become hollow. Both agree that the individual is thrown back on himself or herself, anxious, free, and responsible. Both agree that authentic existence requires a decision that no one else can make for us. The question is what that decision leads to: for the religious existentialists, it leads to a renewed encounter with the divine; for the atheist existentialists, it leads to the recognition that we are alone and must create meaning from our own resources.

Definition

Religious existentialism, in the broadest sense, is the application of existentialist method and themes — subjectivity, anxiety, freedom, authenticity, the irreducibility of the individual — to the questions of religion: God, faith, sin, grace, and the meaning of existence. Its central claim is that religious truth cannot be adequately grasped as a set of objective propositions. Religious truth is existential truth: it must be appropriated by an existing individual who is personally transformed by it. As Kierkegaard put it, "subjectivity is truth" — not in the sense that any opinion is as good as any other, but in the sense that the deepest truths cannot be known from the outside, as an observer knows a fact, but only from the inside, as a person stakes his or her existence on them.

Atheist existentialism shares the method but rejects the conclusion. For Sartre, the existentialist starting point — existence precedes essence — entails that there is no human nature and no divine plan, and therefore no objective ground for values. "Everything is indeed permitted if God does not exist," Sartre writes, "and man is in consequence forlorn, because neither within him nor without does he find anything to cling to." The religious existentialist answers that this forlornness is precisely the situation that faith addresses: it is in anxiety and abandonment that the individual becomes ready for the encounter with God. The two positions therefore agree on the phenomena — anxiety, freedom, the burden of choice — and disagree on what they mean.

Historical Context

The existentialist engagement with religion begins with Kierkegaard in the 1840s. Writing against the twin idols of Hegelian system and Danish Christendom, Kierkegaard argued that Christianity had been reduced to a cultural form in which everyone was a Christian and no one was one. His pseudonymous works — Fear and Trembling (1843), The Concept of Anxiety (1844), The Sickness Unto Death (1849) — together constitute a sustained effort to make the individual's relation to God a matter of passionate, personal decision rather than social habit. The "leap of faith" is not an irrational jump; it is the decision to commit oneself without the guarantees that the understanding demands.

The twentieth century saw the flowering of religious existentialism across three traditions. In Protestant theology, Paul Tillich (1886–1965) built on Kierkegaard and Heidegger to develop an existential theology in which God is understood not as a being among beings but as "the ground of being," and in which courage is the answer to the anxiety of fate, death, guilt, and meaninglessness — the argument of The Courage to Be (1952). Rudolf Bultmann applied existentialist interpretation to the New Testament, arguing that the mythological language of scripture must be "demythologized" so that its existential meaning can speak to modern people. In Catholic thought, Gabriel Marcel (1889–1973) developed a philosophy of "being" and "mystery" in which God is approached not through proof but through fidelity, hope, and the I-Thou encounter — themes he shared with the Jewish philosopher Martin Buber, whose I and Thou (1923) became one of the most influential religious-existentialist texts of the century. Karl Jaspers, in a border zone between philosophy and religion, spoke of "transcendence" and "boundary situations" — the experiences of suffering, guilt, and death in which the individual is confronted with what surpasses him.

Alongside this development ran the atheist line, whose philosophical roots lie in Nietzsche's proclamation of the death of God and his critique of religious morality. Sartre's atheism is not a casual rejection but a consequence of his account of consciousness as a "nothingness" that cannot be grounded in anything outside itself; his lecture Existentialism Is a Humanism (1946) explicitly argues that existentialism is a humanism because it begins from the absence of God. Camus stands slightly apart: he is not concerned to prove or disprove God but to ask how one should live once the absurd is recognized — a question he treats as prior to the religious one, and which he answers with revolt rather than hope.

Philosophical Perspectives

The religious existentialist perspective can be characterized by four commitments. First, faith is not assent to propositions but a mode of existence: it is trust, commitment, and self-surrender, closer to love than to belief in the ordinary sense. Second, the individual is irreplaceable: no church, no system, no priest can stand in for the personal relation to God, and every attempt to dissolve the individual into a collective is a form of evasion. Third, anxiety, guilt, and despair are not merely obstacles to faith but its psychological preconditions: it is the person who has learned to be anxious "in the right way" who is ready for the leap. Fourth, God is not an object of speculative proof but the ground of the self's being: the question of God is the question of what can sustain the self in its confrontation with finitude and death.

The atheist existentialist perspective is the mirror image. For Sartre, the fact that existence precedes essence means that there is no fixed human nature, hence no divine designer, hence no objective moral law. The consequence is not despair but responsibility: "man is condemned to be free," and in choosing, he chooses not only for himself but for all mankind. Because there is no God to ground values, the individual must create them — and the attempt to pretend otherwise, to act "as if" values existed objectively, is bad faith. Camus's position is subtly different: he does not deny God's existence as a metaphysical claim but treats the question as unanswerable and practically irrelevant. What matters is the absurd — the contradiction between our demand for meaning and the world's silence — and the response of lucid revolt: to live without appeal, to love the life one has, and to stand in solidarity with other finite creatures.

These perspectives can be schematized as three answers to the question "what can ground meaning?" The religious existentialist answers: a relation to the divine, entered through the leap of faith. The Sartrean answers: nothing external — meaning is created by free choice and commitment. The Camusian answers: meaning is neither given nor created in the strong sense; what is available is revolt and solidarity in the face of the absurd. What is striking is that all three agree that the old answer — meaning is supplied automatically by God, nature, or society — is no longer available. The disagreement is over what remains when that answer fails.

Different Traditions Comparison

Comparing the religious and atheist branches clarifies the stakes. On faith: for Kierkegaard and his heirs, faith is the highest form of human existence, the only cure for despair; for Sartre, faith in God is a self-contradiction that diminishes human responsibility; for Camus, religious hope is a form of "philosophical suicide" — the surrender of lucidity. On anxiety: for the religious thinkers, anxiety is the school of faith, the experience of possibility that drives the individual toward God; for Sartre, anxiety is the permanent condition of a freedom that can never escape itself; for Camus, anxiety is the mood of the absurd, to be faced with lucidity rather than resolved. On freedom: religious existentialism locates the ground of freedom in God — "before God" the individual becomes a self; atheist existentialism locates the ground of freedom in nothing — the individual must become a self without any ground at all.

The comparison also extends to the understanding of community. Religious existentialism, despite its individualism, leads to a community of faith: the church understood not as an institution but as the gathering of those who have made the leap. Marcel's and Buber's emphasis on the I-Thou relation makes encounter with the other a road to the divine. Atheist existentialism is more ambivalent: Sartre's No Exit ("hell is other people") and his later turn toward a "morality of ambiguity" reflect the difficulty of grounding ethics without God. Camus moves decisively in the direction of solidarity: the absurd, recognized by all, founds a community of revolt — "I rebel, therefore we exist." In both branches, the solitary individual of the starting point turns out to need others; the question is whether that togetherness has a religious or a secular ground.

What distinguishes the two branches most sharply is the place of hope. For the religious existentialist, hope is not a naive optimism but a virtue grounded in faith: because the self can be "grounded transparently in the power that established it," despair is not the last word. For the atheist existentialist, hope in the religious sense is the betrayal of the human condition: the honest response to the absurd or to the absence of God is courage without hope — "we must imagine Sisyphus happy." Yet even this is a kind of hope: the hope that a life can be worth living without guarantee, through the quality of one's engagement with it.

Modern Reflection

The existentialist engagement with religion has left a deep mark on modern theology and on the contemporary discussion of secularism and spirituality. Tillich's method of correlation — philosophy asks the questions, theology provides the answers — shaped a generation of Protestant theology. Bultmann's program of demythologization influenced the entire hermeneutical tradition. Marcel's and Buber's philosophies of encounter anticipated the dialogical turn in ethics and in the philosophy of communication. At the same time, the atheist branch shaped the terms of modern secularism: the claim that the death of God leaves human beings with a choice between despair, bad faith, and self-creation remains one of the most influential diagnoses of the modern condition.

In contemporary culture, the existentialist framework continues to structure the way many people approach religious questions. The language of "spiritual but not religious," the emphasis on personal experience over doctrine, the sense that faith must be "authentic" rather than inherited — all of these are echoes of the existentialist insistence that religious truth must be subjectively appropriated. Conversely, the "New Atheist" debates of the early twenty-first century largely rehearse the Sartre–Kierkegaard dispute in contemporary idiom: does the absence of God make meaning impossible, or does it make meaning our responsibility? The existentialist tradition's distinctive contribution is to have shown that this question cannot be settled by argument alone: it is decided, if at all, by how a person lives.

Related Thinkers

The religious branch of the tradition is anchored by thinker-kierkegaard, whose leap of faith, analysis of anxiety, and critique of Christendom founded religious existentialism. thinker-paul-tillich and thinker-gabriel-marcel translated the tradition into Protestant theology and Catholic philosophy respectively, while thinker-karl-jaspers developed its philosophy of transcendence and boundary situations. thinker-martin-heidegger is the ambiguous pivot: his analysis of being-toward-death and authenticity deeply influenced Tillich and Bultmann, even though Heidegger himself moved away from theism. On the atheist side, thinker-nietzsche supplied the proclamation of the death of God and the critique of religious morality; thinker-jean-paul-sartre drew the systematic consequences; and thinker-albert-camus turned the question of life after the death of God into an ethics of revolt and solidarity.

Related Quotes

The religious and atheist branches of the tradition have each produced defining sentences. Kierkegaard's claim that "the leap of faith" is a decision that cannot be mediated by reasons, and his definition of faith as the self's willing to be itself "grounded transparently in the power that established it," are the foundations of religious existentialism. Tillich's definition of faith as "ultimate concern" and his account of "the courage to be" extend the same insight into modern theology. Against this stands Nietzsche's announcement of the death of God, Dostoevsky's Ivan Karamazov on "everything is permitted," and Sartre's declaration that man is "condemned to be free." For the ZHAIBIAN collection, the relevant quotations are quote-kierkegaard-on-faith, quote-kierkegaard-on-the-leap, quote-dostoevsky-on-god, and quote-nietzsche-on-nihilism. Read together, they frame the great debate of the tradition: whether the abandonment of the human condition is the threshold of faith or the truth of atheism.

Further Learning

To explore religious existentialism, begin with Kierkegaard's Fear and Trembling and The Sickness Unto Death, then Tillich's The Courage to Be and Dynamics of Faith, Marcel's The Philosophy of Existentialism and The Mystery of Being, and Buber's I and Thou. For the atheist side, read Sartre's Existentialism Is a Humanism and Being and Nothingness, and Camus's The Myth of Sisyphus and The Rebel. The ZHAIBIAN pages on the leap of faith, Kierkegaard versus Tillich, and Kierkegaard versus Nietzsche provide focused comparisons, and the collection existentialism-and-the-meaning-crisis situates the debate within the broader question of modern meaninglessness. For the concept of faith itself, see wisdom-faith and wisdom-hope.

Sources

• Stanford Encyclopedia of Philosophy, "Existentialism."
• Stanford Encyclopedia of Philosophy, "Søren Kierkegaard."
• Stanford Encyclopedia of Philosophy, "Paul Tillich."
• Internet Encyclopedia of Philosophy, "Gabriel (Honoré) Marcel."
• Stanford Encyclopedia of Philosophy, "Jean-Paul Sartre."
• Internet Encyclopedia of Philosophy, "Existentialism."