The body as facticity is grounded in the nihilation of the in-itself at birth.

Evidence

It is nonetheless true that the psychic movement refers to two limits—the future terminus of its result, and the past terminus—the motionless organ which it alters and surpasses. I perceive the movement-of-the-arm as a perpetual, inapprehensible reference toward a past-being. This past-being (the arm, the leg, the whole body at rest) I do not see at all; I can never catch sight of it except through the movement which surpasses it and to which I am a presence—just as one gets a glimpse of a pebble at the bottom of the stream through the movement of the water. Yet this immobility of being which is always surpassed and never realized, to which I perpetually refer in order to say what is in motion—this is pure facticity, pure flesh, the pure in-itself as the past of a transcended transcendence which is perpetually being made past. — Jean-Paul Sartre, Being and Nothingness, 906 (#expands, via linked claim)

The illness is mine in this sense that I give to it its matter. I apprehend it as sustained and nourished by a certain passive environment in which the passivity is precisely the projection into the in-itself of the contingent facticity of the pains. It is my passivity. This passive environment is not apprehended for itself except as the matter of the statue is apprehended when I perceive its form, and yet it is there. The illness feeds on this passivity and magically derives new strength from it just as Antaeus was nourished by the earth. … We shall call it a psychic body. It is not yet known in any way, for the reflection which seeks to apprehend the pain-consciousness is not yet cognitive. — Jean-Paul Sartre, Being and Nothingness, 884 (#expands, via linked claim)

If, furthermore, as I am convinced, death is immanent in life from the outset, this, too, involves a stepping out of life beyond itself. From its center, life stretches out toward the absolute of life, as it were, and becomes in this direction more-life; but it stretches out toward nothingness as well. … The deep relationship between birth and death, which man has always perceived, as if some formal relation existed between them as life catastrophes, finds here its metaphysical pivot. Both events are attached to the subjective life and transcend it, toward above and toward below, so to speak. The life beyond which they extend is nevertheless not conceivable without them. — Georg Simmel, on individuality and social forms_…, 826 (#expands, via linked claim)

Categorization

• XREF: connects to: Nausea reveals facticity through the body’s inescapable belonging to being; The body’s immobility as surpassed facticity is the pure in-itself — Jean-Paul Sartre, Being and Nothingness: An Essay on…, 906; The psychic body is the body as passive matter projected into the in-itself. — Jean-Paul Sartre, Being and Nothingness: An Essay on…, 884 (+4 more)

Broader Connections

• The body’s immobility as surpassed facticity is the pure in-itself #expands (0.82) — Jean-Paul Sartre, Being and Nothingness, 906
• The psychic body is the body as passive matter projected into the in-itself. #expands (0.75) — Jean-Paul Sartre, Being and Nothingness, 884
• The For-itself retroactively constitutes the past from which it appears born #corroborates (0.72) — Jean-Paul Sartre, Being and Nothingness, 479
• Birth and death are immanent extensions of life itself. #expands (0.72) — Georg Simmel, on individuality and social forms_…, 826