Principle of intentionality

The Principle of intentionality is the claim that consciousness is always consciousness of something: it is an activity directed toward an object, not a receptacle containing mental contents. Jean-Paul Sartre makes this principle a foundation for describing perception, knowledge, and imagery without treating consciousness as one more thing in the world. Its force lies not only in saying that consciousness has an object, but in requiring an account of how distinct acts disclose, organize, and sometimes imagine what they are about.

Definition and philosophical stakes

Jean-Paul Sartre adopts the principle in connection with Husserl’s proposal to bracket the natural positing of the world. In ordinary psychological explanation, consciousness can be treated as though it were itself an object among objects. Bracketing that assumption shifts attention from a supposed inner container to the acts through which a world is encountered. The principle’s familiar formulation, “all consciousness is consciousness of something,” is therefore not a tautology: it asserts that consciousness has an intentional structure and is aimed beyond itself.

This shift changes the task of psychology. Rather than first treating sensory givens as contents lodged inside consciousness, the inquiry can distinguish modes of intentionality according to the situations in which consciousness operates. Perception, mental imagery, and thought are all directed acts, but they do not direct themselves toward their objects in the same way. The principle supplies a common starting point while making those differences essential to the analysis.

The object of an act also differs from the act itself. An unreflective consciousness of a tree is directed toward the tree, an external body, rather than toward consciousness as its own object. Reflection can make the earlier act an object of inquiry, but the unreflective act is not for that reason unconscious of itself. Sartre describes it as having an immanent, nonthetic awareness of itself: it is consciousness through and through even while its object is the tree. The distinction prevents reflective observation from being mistaken for the structure of consciousness in its ordinary, object-directed operation.

Intentionality in perception and imagery

The principle becomes concrete in Sartre’s account of a schematic face. A few black marks on white paper can first be apprehended as separate lines and points, organized by the eye into one configuration. They can then be seen as a face: one segment becomes a forehead, another an eyebrow, a descending line a nose, a point an eye, and a sinuous mark a mouth and chin. The marks have not changed, but the act directed toward them has. The perceptual organization gives way to an imaging intention, and the viewer’s eye movements and bodily orientation help animate the drawing.

This change is not simply a matter of finding a face already present in the marks. The page itself is reorganized: the white area to one side is apprehended as a filled volume belonging to the face, while the area on the other side serves as empty ground. Where the drawing lacks a connecting line, the viewer’s eyes enact its direction and synthesize the separated marks into one figure. The example shows intentionality at work in detail: the image depends on an act that interprets the lines, but the lines alone do not amount to the imaged person.

Sartre contrasts this with perceptual figures that impose or habitualize movements of the eyes. In the Müller-Lyer illusion, closed angles check one set of eye movements while open angles allow another to continue. Those movements are attributed to the line segments, which consequently appear to possess different powers of extension. The perceived lines acquire a quality through this organization, but the resulting object remains perceptual; it is not thereby an image. In schematic imagery, by contrast, eye movements are experienced as spontaneous and can be projected onto lines as imaged directions. Knowledge helps guide those movements, and the figure may crystallize as a man running. Even then, the viewer knows the image is being freely created rather than simply encountered as a real object.

These examples give the principle a precise application: an object’s appearance depends on the intentional act, but different acts do not become interchangeable just because they concern similar material. A drawing can be perceived as marks, organized as a perceptual figure, or taken as the medium for an image. Intentionality identifies the directedness common to these experiences; examining the act reveals what kind of object is constituted in each.

Knowledge, signs, and the limits of imagery

Intentionality also distinguishes pure knowledge from imagery. Knowledge can grasp relations without presenting an intuitive image: the blue in a painting may be thought of as “the fourth primary colour,” or the word mountain may suggest a direction toward something that could be climbed. In such cases, consciousness is directed toward an order, relation, or rule, while sensible matter is present only as designated support. The knowledge may be detailed and connected to individual objects, yet remain an empty sign-consciousness rather than an image.

An image cannot simply be added to such knowledge as an illustration that fills an otherwise empty thought. Sartre argues that imagery is itself a consciousness, not a passive content that completes another act. When an image appears, a new synthesis takes place; the intentional structure has changed, not merely acquired sensory fullness. This is why a schematic figure can carry an undifferentiated wealth of knowledge about a person without literally depicting all those qualities in its lines. The lines may provide only structural relations and attitudes, while the viewer’s intentions give them depth and animate what is latent in the schema.

The same distinction matters for perception. People perceive more than they presently see, but Sartre rejects the explanation that images are inserted into perception to supply missing sensory features. A real object is apprehended through a complex of unformulated intentions: an ashtray’s visible upper face, for example, is perceived as belonging to an object with an underside, resting on a table and made of porcelain. Such knowledge adheres to the perceived object without positing a separate image. It enriches perception while remaining different from imaging consciousness.

Aesthetic objects and the reach of the principle

Sartre extends this analysis to art. In a portrait of Charles VIII, the canvas, frame, and actual layers of paint are real, but the depicted king as an object of aesthetic appreciation is not simply one more real feature of the painted surface. He appears when consciousness takes an imaging attitude toward the painting. The aesthetic object is thus an irreality disclosed through a real material support, not a real object hidden behind the canvas waiting to be perceived.

The painter does not transfer a private mental image into a real painting. Brushstrokes, impasto, canvas grain, and varnish are real; they form a material analogon through which a spectator can apprehend the image. The painting remains a physical thing, but it is visited by the irreal object when a spectator adopts the imaging attitude. Even the pleasure of a painted colour belongs aesthetically to the depicted whole: a red is apprehended as the red of a rug, with its tactile and material qualities, rather than as an isolated patch of sensory stimulation.

The account extends beyond painting. A novelist, poet, or dramatist constitutes irreal objects through verbal analogons; an actor’s body, feelings, and gestures serve as analogons for Hamlet. The actor need not believe, in the sense of taking himself to be the character, for his performance to mobilize him fully. His real tears can be apprehended as Hamlet’s irreal tears: the actor is irrealized in the character rather than the character becoming a real person in the actor.

Music offers a further test. A performance of Beethoven’s Seventh Symphony is a real, dated event, yet a listener can apprehend the symphony itself across different performances, including one heard at another time under another conductor. The conductor, orchestra, and auditorium may recede from attention as the listener turns toward the work. Across these examples, the principle explains how consciousness can be directed through a physical or verbal medium toward an object that is not identical with that medium. Its significance is therefore both methodological and aesthetic: to understand what consciousness encounters, one must ask not only what material is present, but what intentional act makes it appear as its object.