The body as being-for-itself and being-for-others

The body as being-for-itself and being-for-others is Sartre’s account of embodiment as two irreducible modes of being, not a physical object that consciousness must somehow join. The body is lived from within as the unthematized condition of possibilities and action, yet it can also appear as an object among objects, exposed to perception by oneself and by others. Sartre’s distinction explains why no anatomical description, visual image, or theory of sensation can by itself capture the body as lived: each belongs to a different level of experience.

The Problem of Joining Consciousness to a Body

Sartre begins with a methodological mistake: consciousness is first grasped through inward reflection, while the body is treated as an externally definable thing, made of organs and matter. If these two starting points are then taken as separate realities that need to be united, their connection seems insurmountably difficult. But the apparent puzzle is produced by describing not the body as it is lived, but the body as it appears to others—as an organism that can be examined, dissected, and analyzed.

The distinction concerns the order in which knowledge is acquired, not a denial of anatomy. A person need not claim to lack a brain, heart, or stomach to observe that these organs are not directly known in the same way as lived experience. Physicians encounter the body in the world, as an object available to examination. The first-person body, by contrast, does not ordinarily appear to its bearer as an anatomical specimen. The mistake is to treat knowledge of the body-for-others as though it supplied the original bond between consciousness and embodiment.

Even an image of one’s own vertebrae does not dissolve that distinction. During radioscopy, the person sees a picture on a screen and apprehends it as an object among other objects; reasoning then identifies that object as belonging to the self. In this respect the pictured body is more like one’s property than one’s being. The image may provide information about the body, but it does not turn the body as lived into an object of direct inner inspection.

The Body Lived as Possibility

The body as being-for-itself is not ordinarily encountered as a complete object that consciousness observes from within. A person can see or touch a hand, but in doing so encounters it as a thing in the world, not as the very activity by which the world is being disclosed. The eye may be imagined as visible to another eye, yet the seen eye is then an object; it cannot at the same moment be apprehended in its act of seeing. Likewise, a hand reveals the hardness or softness of what it touches, not itself in the act of touching. The body’s lived activity recedes as attention turns to the body as something perceived.

For this reason Sartre rejects the supposed “sensation of effort” as an explanation of embodiment. The hand discloses the resistance of objects, while the body itself is not thereby given as an additional object of sensation. When a person touches a leg, the experience of touching and the experience of being touched are not one unified phenomenon that can simply be gathered under the name “double sensation.” They are distinct orders of experience. Cold or a dose of morphine can make the sensation of being touched disappear without thereby erasing the basic difference between acting through the body and encountering the body as touched.

The body can also become an object without ceasing to be involved in action. A person may see or touch a leg in order to pull on trousers or change a dressing on a wound. The leg can be arranged to make this practical work easier, but the action still reaches beyond the leg as an object toward the possibility of curing oneself. What is made present is the thing called a leg, not the lived possibility of walking, running, or playing football. This is the shift Sartre describes as the transformation of living possibilities into “dead-possibilities”: the body’s objectification reveals a way it exists, but does not reproduce its living agency.

The Body as Object and the Gaze of Others

Seeing the body as an object is a genuine disclosure of its being, but what is disclosed is its being-for-others. A person can see a hand or leg in the world as one sees an inkwell: as a thing at a distance, placed among other things. When a doctor examines a wounded leg while the patient watches from a partly raised position in bed, the patient’s visual perception of the leg belongs to the same general field as the perception of the doctor’s body. The distinction between these perceptions is one of structure within a single global perception, not an absolute division between an inward body and an outward one.

This account also clarifies why the body’s objectivity cannot be used to explain consciousness’s original experience of the world. The familiar puzzle of “inverted vision” asks how upright objects can be seen when their images are inverted on the retina. Sartre traces the puzzle to a physical model that treats the eye, lens, retina, and candle as components in an external system. In that model the retina is a screen and the lens an optical device; the eye is considered from outside, as a dead object in the visible world. Such relations are real as relations of being-for-others, but they do not explain how consciousness, as interiority, encounters what is visible. The problem arises when an account built from the other’s body is made to stand for the lived relation between consciousness and its world.

The distinction between the body’s modes of being therefore cannot be erased by combining them into a single account. The body-for-others is wholly bodily: nothing hidden behind it needs to be joined to it as a separate psychic substance. Yet this does not make the lived body reducible to an anatomical object. Each level has its own character, and neither can be derived from the other. Sartre’s insistence on keeping them apart is not a division of the person into two substances, but a refusal to confuse objectification with lived existence.

Facticity and Being-in-the-World

Sartre places his account under the heading “The Body as Being-for-Itself: Facticity.” The heading signals that the lived body is not an optional instrument added to an otherwise self-contained consciousness. Reflection may disclose pain, discomfort, or pleasure, but these experiences are not merely signs of bodily events arriving from outside consciousness. To treat them only as effects caused by an external body would once again push the body out of experience and leave an already objectified body with no adequate bond to the consciousness supposed to reveal it.

The proper point of departure is being-in-the-world. Sartre rejects the picture of a for-itself closed on one side and a world closed on the other, with a connection between them to be explained afterward. The for-itself is already a relation to the world: by not being identical with being, it makes a world appear, and by surpassing that negation toward its possibilities, it discloses particular things as instrumental. In this account, embodiment belongs to the practical relation through which the world takes shape, rather than serving as a mechanical intermediary inserted between consciousness and external reality.

The world itself appears as a multiplicity of relations, not as a view from nowhere that one consciousness could survey without perspective. A glass is to the left and a little behind a decanter for one observer, while it is to the right and a little in front for Pierre. Those orientations cannot be fused into one lived viewpoint without dissolving the particular things into an undifferentiated whole. Similarly, a table leg conceals the designs in a rug from a viewer’s sight. That concealment is not merely a defect of vision: the rug’s position under or beside the table is part of the relations that make both things belong to a world. The lived body’s situated access is thus not an accidental obstruction to an otherwise complete view; it is part of the structure by which a world of distinct things and relations is disclosed.