Jean-Paul Sartre

Jean-Paul Sartre emerges in this glossary as a philosopher of consciousness, contingency, and unavoidable freedom. Human existence has no external justification, and human projects pursue an ideal they cannot attain: becoming God, at once a free For-itself and an absolute In-itself. Against that absurdity, Sartre’s account makes freedom neither a power to guarantee success nor an escape from circumstance, but the continual necessity of choosing and making oneself.

Being, Consciousness, and the Cogito

Sartre’s account begins with a distinction between Being and existence. Being is all-embracing and objective, encompassing both Being-in-itself and Being-for-itself; its compact formula is that Being is, is in-itself, and is what it is. Being-in-itself is non-conscious plenitude, exceeding whatever knowledge can grasp. Being-for-itself, by contrast, is consciousness understood as a lack of Being and a relation to Being: it nihiliates the in-itself, introducing Nothingness into the world and making possible a standpoint from which beings can be distinguished and judged.

Consciousness is always consciousness of something, not a sealed interior substance. Sartre claims that the pre-reflective cogito is the pre-cognitive basis of the Cartesian cogito. The claim makes reflection secondary to an already operative awareness: consciousness is present to an object before it turns back to examine itself. The glossary also describes a cogito concerning the existence of Others. Although the Other’s existence cannot be proved abstractly, this disclosure gives the Other a concrete, indubitable presence, comparable to the subject’s own contingent but necessary existence.

Phenomenological Method

Sartre draws on phenomenological concepts while refusing to detach consciousness from its worldly situation. Eidetic reduction, associated with Edmund Husserl, treats an object or an isolated example of subjectivity as an instance through which its essence can be considered, without affirming that particular instance’s actual existence. Sartre’s gloss emphasizes the movement from a concrete phenomenon toward its essence. The method thus permits analysis to pass beyond an individual example without turning that example into proof of a pre-established human nature.

That adaptation has a limit: Sartre cannot accept Husserl’s epoché as a procedure that brackets every idea of the world in order to inspect consciousness independently of worldly existence. His task, as the entry puts it, is to examine consciousness in the world. This difference keeps phenomenological analysis tied to concrete existence rather than to an abstract consciousness isolated from its circumstances.

Freedom, Essence, and Self-Making

For Sartre, essence is what has been: the past a person makes through living, not a prior pattern that dictates what a person must become. Human existence is concrete and individual, while its essence takes shape retrospectively through its acts. The result is a continuing relation between what a person has already made and what remains to be chosen, rather than a fixed human nature that precedes life.

Freedom names the very being of the For-itself. A person is condemned to be free and must forever choose and make the self. Sartre’s distinction between freedom and success is crucial: freedom does not mean obtaining what has been wished for, but determining oneself to wish, in the broad sense of choosing. Whether a project succeeds therefore does not settle whether the agent is free. Freedom is not an optional power added to an otherwise complete self; it is the condition that makes self-making unavoidable.

Absurdity and Bad Faith

The absence of external justification makes human existence absurd: contingency has no outside ground that could establish why a person exists. Projects inherit that absurdity because their ultimate aim is unattainable. The desire to become God seeks a condition in which the For-itself’s freedom and the In-itself’s absolute fullness could coincide, though the two modes of Being remain opposed in Sartre’s account. The aspiration gives human projects direction without supplying a final guarantee that they can be fulfilled.

Bad faith is a lie a person tells themself within a single consciousness, an effort to escape the responsible freedom of Being-for-itself. It works through a vacillation between transcendence and facticity: the person refuses to recognize either dimension for what it is, or to synthesize them. The evasion depends on keeping the two in unstable alternation. Because freedom cannot be removed from human existence, bad faith does not eliminate responsibility; it is a way of refusing to acknowledge the condition on which responsibility rests.

Significance of the Account

Together, these definitions make Sartre’s philosophy a theory of situated self-creation rather than a doctrine of unconstrained success. The For-itself is bound to the world and its own past, yet neither circumstance nor an inherited essence completes the self in advance. It stands apart from what is through consciousness and projects itself through choice; each choice makes a life more definite while leaving its ultimate justification unresolved.

The account’s central tension is therefore not between freedom and all constraint, but between freedom as the unavoidable work of making oneself and the wish to escape that work through guarantees, fixed identities, or bad faith. Absurdity names the lack of an external foundation, while freedom names the responsibility that remains when such a foundation is absent. Sartre’s treatment of the cogito, phenomenological method, essence, and self-deception converges on this claim: no final success or pre-existing human nature can spare a person from choosing.