Nightmare

A Nightmare, in Jean-Paul Sartre’s analysis, is not defined by how frightening its imagined events are. Its defining condition is the sleeper’s entanglement in a fictional world: reflection can be overwhelmed, and the dream continues to turn experience into the imaginary. Real fear may lend the dreamed world its sinister character, but the events and feelings assigned to the dreamed self do not necessarily become actual feelings in the sleeper. The distinction explains both why some terrifying dream scenes pass without becoming nightmares and why an apparently ordinary dream can become one.

Definition and Relation to Dream

A Nightmare belongs to the broader structure of Dream, but its defining feature is not simply frightening content. A dreamed self may be terrified without the sleeper being disturbed; in that case, the dream has assigned a plausible feeling to its imagined protagonist, rather than producing that feeling in the sleeper. Sartre compares this distance to reading a novel whose terrible events do not necessarily move its reader. The dreamed self’s experience and the sleeper’s affect are therefore not interchangeable.

Conversely, a nightmare need not contain a terrible adventure. The sleeper’s real affectivity may already be present before the dream takes shape, and the dream then stages that condition in imaginary form. Even an event that is not objectively grave can be grasped as sinister because the sleeper is already stricken. The nightmarish quality can thus belong to the atmosphere of the dreamed world rather than to the dramatic severity of what happens in it.

This account depends on distinguishing the dream’s imagined self from the consciousness that dreams. An apparent moment of reflection inside a dream does not necessarily mean that the sleeper has reflectively recognized the dream as a dream. The imagined self may think that it is awake, afraid, or humiliated; these thoughts remain part of the fiction unless actual reflection breaks the dream’s hold.

Reflection and the Dream’s Fragility

For Sartre, a dream is fragile before reflective consciousness. When the dreamer genuinely reflects and recognizes the experience as a dream, the act of recognizing it disrupts the dream rather than confirming it, as reflection can confirm awareness of perception. A dreamer may suddenly note that a dream is taking place, but the reflective consciousness that makes this recognition also marks a momentary awakening. In a Nightmare, by contrast, a desperate thought that one is dreaming may fail to bring the sleeper out of it: reflection disappears almost at once, and the dream recaptures consciousness.

The distinction between genuine reflection and an imagined reflection is crucial. Sartre describes dreams of walking through New York with pleasure, sometimes accompanied by the thought that this time the experience is not a dream. That assurance belongs to the dreamed self, not to a waking reflective act. The sleeper’s desire to remain in New York is projected into the fiction, where the dreamed self can find itself there as if in waking life. What looks like a successful test of reality is still part of the dream’s construction.

A sleeper may struggle to remember that reflection is possible, especially during a Nightmare. Yet those efforts can themselves be converted into fiction: the sleeper debates or tries to escape, but the dream absorbs the attempt rather than allowing it to become a stable reflective standpoint. The very process that could end the dream is difficult to produce because the dream’s spellbound consciousness cannot readily conceive the motives that would prompt it.

Affect and the Nightmarish Atmosphere

The Nightmare’s affective force is not reducible to the imagined events. Sartre rejects the picture of feeling as a sealed-off inner state accidentally attached to an object. A feeling is directed toward something: it gives an object an affective sense. Applied to dreaming, this helps explain how the sleeper’s real affectivity can shape the world of the dream without making its imagined events real. The dreamed scene becomes sinister through the way it is apprehended, not solely through what happens in its plot.

This also clarifies why terror in the dreamed self does not automatically constitute a Nightmare. The dream may merely represent the self as frightened, while the sleeper remains impassive. In a Nightmare, real affectivity is already at work and the dream enacts it on imaginary ground. The dreamed world can therefore carry a nightmarish atmosphere even when its events are comparatively slight; its emotional tone reflects the sleeper’s condition rather than a simple measure of danger within the fiction.

How a Nightmare Ends

Sartre identifies two broad ways in which a dream can be interrupted. In the first, reality breaks through. The real fear that helped produce the Nightmare may become strong enough to turn attention toward the sleeper’s actual state, making the sleeper conscious both of being afraid and of dreaming. An external stimulus can also interrupt the fiction: it may arrive as a surprise, provoke a real emotional shock, or persist as an order through sleep. In each case, the decisive change is that something motivates genuine reflection rather than being absorbed as another element of the dream.

The second route to interruption is internal to the dream. A story may reach an ending presented as final, with no imaginable event after it. Sartre gives the example of repeatedly dreaming of an impending execution, with the dream stopping at the moment the dreamed self is placed at the block. Fear does not necessarily cause the awakening; the dream may not even feel like a Nightmare. Instead, consciousness hesitates because it cannot imagine what follows. That hesitation prompts reflection and ends the dream.

Significance and Distinction from Reality

Against René Descartes’s account of dreaming as an apprehension that may be confused with reality, Sartre treats the dream as fiction that consciousness lives as fiction, even while it may be unable to leave it. The sleeper’s difficulty is not simply mistaking an unreal object for a real one. Consciousness is bound to produce the imaginary, and efforts to recover reality may be transformed into further imaginary material. The Nightmare makes this captivity especially clear: its force lies in the difficulty of escaping the fiction, not in proof that its objects have become real.

This distinction also sets the dream apart from Hallucination. Sartre’s account of hallucination concerns alterations in belief and in the relation between perception and imaging consciousness; a Nightmare is instead a dream-world whose fictional character remains central to its structure. Both cases pose questions about how consciousness relates to what appears, but the Nightmare illustrates a consciousness absorbed in an irreal world, not simply one that has mistaken an image for a perception. Its significance is therefore philosophical as well as psychological: it offers a way to consider what experience would be like when the real world no longer governs consciousness and reflection cannot readily release it from the imaginary.