The ultimate possibility is the unitary synthesis of all actual possibles, not death.

Evidence

Thus we must conclude in opposition to Heidegger that death, far from being my peculiar possibility, is a contingent fact which as such on principle escapes me and originally belongs to my facticity. I can neither discover my death nor wait for it nor adopt an attitude toward it, for it is that which is revealed as undiscoverable, that which disarms all waiting, that which slips into all attitudes (and particularly into those which are assumed with respect to death) so as to transform them into externalized and fixed conducts whose meaning is forever entrusted to others and not to ourselves, Death is a pure fact as is birth; it comes to us from outside and it transforms us into the outside. At bottom it is in no way distinguished from birth, and it is the identity of birth and death that we call facticity. — Jean-Paul Sartre, Being and Nothingness, 1268 (#contradicts, via linked claim)

Being-in-itself can not “be potentiality” or “have potentialities.” In itself it is what it is—in the absolute plenitude of its identity. The cloud is not “potential rain;” it is, in itself, a certain quantity of water vapor, which at a given temperature and under a given pressure is strictly what it is. The in-itself is actuality. But we can conceive clearly enough how the scientific attitude in its attempt to dehumanize the world has encountered possibilities as potentialities and has got rid of them by making of them the pure subjective results of our logical calculation and of our ignorance. The first scientific step is correct; the possible comes into the world through human reality. These clouds can change into rain only if I surpass them towards the rain, just as the crescent moon lacks a portion of the disc only if I surpass the crescent towards the full moon. But was it necessary afterwards to make of the possible a simple given of our psychic subjectivity? Just as there can be lack in the world only if it comes to the world through a being which is its own lack, so there can be possibility in the world only if it comes through a being which is for itself in its own possibility. — Jean-Paul Sartre, Being and Nothingness, 379 (#expands, via linked claim)

If the possible can in fact come into the world only through a being which is its own possibility, this is because the in-itself, being by nature what it is, can not “have” possibilities. The relation of the in-itself to a possibility can be established only externally by a being which stands facing possibilities. The possibility of being stopped by a fold in the cloth belongs neither to the billiard ball which rolls nor to the cloth; it can arise only in the organization into a system of the ball and the cloth by a being which has a comprehension of possibles. But since this comprehension can neither come to it from without—i.e., from the in-itself—nor be limited to being only a thought as the subjective mode of consciousness, it must coincide with the objective structure of the being which comprehends its possibles. To comprehend possibility qua possibility or to be its own possibles is one and the same necessity for the being such that in its being, its being is in question. But to be its own possibility—that is, to be defined by it—is precisely to be defined by that part of itself which it is not, is to be defined as an escape-from-itself towards—. In short, from the moment that I want to account for my immediate being simply in so far as it is what it is not and is not what it is, I am thrown outside it toward a meaning which is out of reach and which can in no way be confused with immanent subjective representation. — Jean-Paul Sartre, Being and Nothingness, 382 (#corroborates, via linked claim)

Categorization

• XREF: connects to: The in-itself is pure actuality; possibility enters the world only through human reality — Jean-Paul Sartre, Being and Nothingness: An Essay on…, 379; Possibility is a concrete property of already existing beings, not a subjective construct — Jean-Paul Sartre, Being and Nothingness: An Essay on…, 378; Possibility arises only through a being that comprehends and embodies its own possibles. — Jean-Paul Sartre, Being and Nothingness: An Essay on…, 382 (+2 more)

Broader Connections

• The in-itself is pure actuality; possibility enters the world only through human reality #expands (0.85) — Jean-Paul Sartre, Being and Nothingness, 379
• Possibility arises only through a being that comprehends and embodies its own possibles. #corroborates (0.85) — Jean-Paul Sartre, Being and Nothingness, 382
• Death belongs to facticity, not to freedom, and transforms us into the outside. #contradicts (0.85) — Jean-Paul Sartre, Being and Nothingness, 1268
• Possibility is a concrete property of already existing beings, not a subjective construct #corroborates (0.80) — Jean-Paul Sartre, Being and Nothingness, 378
• Possessing pure potentiality can satisfy more deeply than any realization #qualifies (0.75) — Georg Simmel, on individuality and social forms_…, 450