The Visible and the Invisible

Author: Maurice Merleau-Ponty (manuscript, posthumous) Editor: Claude Lefort Translator: Alphonso Lingis Year: Le Visible et l'invisible, Editions Gallimard, 1964; English translation Northwestern University Press, 1968 Type: book — incomplete manuscript followed by a selection of working notes

Merleau-Ponty's unfinished late masterwork — what was meant to be a "phenomenological ontology" inquiring into "the origin of truth" through a philosophy of "wild" or pre-objective Nature. The published text consists of four chapters of philosophical interrogation (critiques of perceptual faith, the philosophy of reflection, Sartrean negativity, and intuitionist phenomenology), one constructive chapter ("The Intertwining—The Chiasm"), an appendix on pre-objective being, and approximately 100 dated working notes spanning January 1959 to March 1961. The constructive chapter introduces the flesh, the chiasm, and reversibility as the core concepts of MP's late ontology.

Status of the Text

Merleau-Ponty died on May 3, 1961, leaving 150 large handwritten pages with copious corrections. The first dated page is March 1959; the latest material is November 1960 ("Interrogation and Intuition"). The work was successively titled "Being and Meaning," "Genealogy of the True," and "The Origin of Truth" before being titled The Visible and the Invisible in March 1959. What we have is a fragment of a much larger projected work that would have addressed: I. Being and World (Visible / Nature), II. Logos and the Word, III. (in earlier outlines) the body, intercorporeity, and the inter-world. Lefort organized the surviving four main chapters under the heading "Philosophical Interrogation."

The Working Notes are not optional appendices: many of MP's most concentrated formulations of the late ontology appear only in the notes (the "finger of the glove" image of reversibility, the explicit auto-correction of the Tacit Cogito, the November 1960 sequence on chiasm, time, and the unconscious, the March 1961 "Worked-over-matter-men = chiasm"). The May–November 1959 notes are especially important: they contain the workshop where key concepts (the Gestalt as transcendence, pregnancy as generative power, topological space as the model of wild being, forgetting as loss of écart) are being forged before their deployment in the constructive chapters.

Core Arguments

The book proceeds by a series of escalating critical interrogations. Each chapter takes a methodological position that seems to do justice to perception and shows that it ends in incoherence — not because the position is wrong but because it suppresses the écart that any contact with Being requires. The constructive chapter (Ch 4) then articulates an alternative whose central claim is that non-coincidence is the principle of communication.

Claim: We see the things themselves — yet as soon as we try to articulate this faith into theses, we enter "a labyrinth of difficulties and contradictions." The perceptual faith is paradoxical: it asserts simultaneously that "the world is what we see" and that "we must learn to see it." Because: The "I" that sees, the "thing" seen, and the world we share each shows two incompatible faces under reflection — and Pyrrhonism, far from dissolving the faith, "shares the illusions of the naïve man" since it still presupposes "Being in itself" as a contrast term. The faith is not naïve belief but the structure of any opening upon a world (Ch 1, p. 3). Against: Both naïve realism and Pyrrhonian skepticism, which are equally pre-philosophical.
Claim: Scientism — the pretension of objective science to deliver Being itself — is the most dogmatic expression of the perceptual faith. Because: Science begins by excluding everything "subjective," then reconstructs it as a special case; but this presupposes a "kosmotheoros" — an unsituated absolute observer, what MP calls pensée de survol (high-altitude thinking) — whose right has not been established. Modern physics has been revolutionizing its categories (Eddington, Einstein, de Broglie) but its philosophical self-interpretation lags behind. The road's "apparent width" cannot be measured in the perception of one walking down it: at higher levels of structural integration the very concept of "functional dependence" breaks down. The failure of objectivism is "not a victory of the 'interior' over the 'exterior'... but a call for the revision of our ontology" (Ch 1, p. 23). Against: Cartesian and post-Cartesian objectivism; Gestalt psychology in its objectivist self-interpretation.
Claim: The philosophy of reflection (Descartes/Kant/Husserl) genuinely tries to overcome the perceptual faith but fails because it misunderstands its own conditions. Because: Reflection converts perception into "thought of seeing," making the world a cogitatum. This appears to dissolve the antinomies — but only by paying a price reflection itself cannot afford: (a) the reflection is itself motivated by an unreflected world it cannot account for; (b) reflection has a constitutive blind spot (the act of reflection itself); (c) the reflective "return" is a post festum construction that pretends to be the inverse traversal of a constitutive route. We need not less reflection but a hyper-reflection (sur-réflexion) that takes itself and its changes into account (Ch 1, p. 38). Against: Descartes ("thought of seeing"), Kant ("if a world is to be possible..."), Husserl's transcendental reduction insofar as it forgets that "every transcendental reduction is also an eidetic reduction."
Claim: Sartre's philosophy of negativity — the For-itself as nothingness, the In-itself as plenitude, the seer as a "lake of nothingness" — is a sophisticated extension of the philosophy of reflection that fails for the same reasons. Because: Negativist thought and positivist thought are "exactly synonymous; there is not the least divergence between them." If Being and Nothingness are absolutely opposed, they "together compose one sole universe of thought, since each of them is only its retreat before the other" — and they secretly require a "Hyper-being" that is "mythical." The opposition is "labile" (chemists' sense — fragile, capable of reversal at any moment) and absolutizes one local empirical phenomenon (shame, the gaze, the medusan freezing) into an ontology. Sartre cannot account for there being multiple others — absolute negation "absorbs into itself every rival negation" (Ch 2, p. 81 footnote). The other must be thought as "a negation-model... not as another universe in which I would be alienated but as the preferred variant of a life that has never been only my own." Against: Sartre, Being and Nothingness; the model of seer-as-clearing.
Claim: We need not less dialectic but a hyper-dialectic — "a thought that is capable of reaching truth because it envisages without restriction the plurality of the relationships and what has been called ambiguity." A "dialectic without synthesis" — but this "is not therefore scepticism, vulgar relativism, or the reign of the ineffable. What we reject or deny is not the idea of a surpassing that reassembles, it is the idea that it results in a new positive, a new position" (Ch 2, p. 94). Because: The dialectic, whenever it stops being "the very movement of the content" and becomes a doctrine (Hegel, Sartre), falls into "bad dialectic" — "an evil genius... a sly power behind our back that confounds us." What is needed is the "good dialectic" that remains "conscious of the fact that every thesis is an idealization." Against: Hegel as systematician; Sartre's bivalent negativity.
Claim: Husserl's Wesensschau and Bergson's intuitive coincidence are "two positivisms" — both attempt to eliminate the écart by either soaring above (essence) or fusing with (intuition) Being. Because: Eidetic variation is borne by the temporality of the varier — there is no "spectator without secrets, without latency." The essence is not above us but "beneath us, a common nervure of the signifying and the signified, adherence in and reversibility of one another." Coincidence cannot be even partial: "in the measure that the thing is approached, I cease to be." The "originating" is not all behind us. The right model is "intuition as auscultation or palpation in depth" — proximity through distance (Ch 3, p. 122). Against: Husserl (intuition of essences, taken as a closed method); Bergson (the intuitive method).
Claim (constructive thesis I — vision and touch as palpation): Vision is "palpation with the look." The body as "sensible for itself" is the exemplar sensible — "a set of colors and surfaces inhabited by a touch, a vision." There is reversibility between sensing and sensed: my left hand touches my right hand touching the things. This structure generalizes to vision and to language. Because: For my hand to touch and not just deform space, "my hand, while it is felt from within, is also accessible from without, itself tangible." Vision, similarly, requires that the seer be one of the visibles: "he who sees cannot possess the visible unless he is possessed by it, unless he is of it." (Ch 4, p. 134-135). Against: The picture of seer as clearing; vision as nihilation; the bifurcation of subject and object.
Claim (constructive thesis II — flesh as element): The flesh "has no name in any philosophy." It is not matter, not mind, not substance, but "an element of Being" in the Presocratic sense — "a general thing, midway between the spatio-temporal individual and the idea, a sort of incarnate principle that brings a style of being wherever there is a fragment of being." Because: There is no other category that can hold what is required: a "concentration of the visibles about one of them," a "formative medium of the object and the subject" that is "the inauguration of the where and the when, the possibility and exigency for the fact." Flesh is facticity, "what makes the fact be a fact." Three modes: flesh of my body (sentient-sensible), flesh of the world ("sensible and not sentient," a "pregnancy of possibles"), flesh as element (the general principle of which the first two are variants) (Ch 4, p. 139-140; May 1960 working notes). Against: Substance ontologies, corpuscular materialism, mind-body dualism.
Claim (constructive thesis III — chiasm as imminent non-coincidence): Reversibility is "always imminent and never realized in fact." The chiasm is not a successful unity of sensing and sensed; it is structural non-coincidence that makes communication possible. Because: "My left hand is always on the verge of touching my right hand touching the things, but I never reach coincidence; the coincidence eclipses at the moment of realization." But this hiatus "is not an ontological void, a non-being: it is spanned by the total being of my body, and by that of the world; it is the zero of pressure between two solids that makes them adhere to one another." The "finger of the glove that is turned inside out" (November 16, 1960 working note) is the emblematic image: "There is no need of a spectator who would be on each side. It suffices that from one side I see the wrong side of the glove that is applied to the right side, that I touch the one through the other... the chiasm is that: the reversibility" (Ch 4, p. 147; Nov 16, 1960 note). Against: Any reading of MP that takes the chiasm as a doctrine of fusion or even partial coincidence.
Claim (constructive thesis IV — the invisible as dimension): The Idea (in Proust's sense — the "little phrase," the notion of light) is "the lining and depth" of the sensible. It is "the invisible of this world, that which inhabits this world, sustains it, and renders it visible, its own and interior possibility, the Being of this being." Not a hidden visible, not a Platonic transcendent — "the level, this dimension." With the first vision is "the opening of a dimension that can never again be closed." Because: Proust's musical idea is the paradigm. The "little phrase" cannot be reduced to its five notes; the notion of light cannot be reduced to its physiology. These ideas "could not be given to us as ideas except in a carnal experience... they owe their authority, their fascinating, indestructible power, precisely to the fact that they are in transparency behind the sensible, or in its heart" (Ch 4, p. 149-152, citing Du côté de chez Swann). Against: The treatment of ideas as either positive entities or absolute transcendents.
Claim (constructive thesis V — language and reversibility): Language exhibits the same chiasmic structure as vision — at a higher ("less heavy, more transparent") register. Operative language is the "obscure region whence comes the instituted light." There is "a reversibility of the speech and what it signifies." Because: As the body is "natural light," speech is "the dehiscence of the seeing into the visible and of the visible into the seeing" but in another flesh. "I hear myself with my throat" (Malraux). The reflexivity of phonation/hearing is the verbal analogue of touching/touched. Reversibility is "the ultimate truth" — "there is no dialectical reversal from one of these views to the other; we do not have to reassemble them into a synthesis: they are two aspects of the reversibility" (Ch 4, p. 154-155, closing). Against: Linguistic positivism (treating language as a pure system of signs); silence-mysticism (treating the lived as inexpressible).

Key Findings

The perceptual faith is paradoxical, not pre-philosophical: it asserts contradictories simultaneously; the philosopher's job is not to resolve them but to think their structure
Hyper-reflection / hyper-dialectic / interrogation form a single methodological constellation: each is the move beyond a method (reflection / dialectic / cognition) by radicalizing it rather than abandoning it
The chiasm is structural non-coincidence: not unity, not even partial unity; communication and intercorporeity rest on a gap that fails to be unity
The flesh has three modes: flesh of my body (sentient-sensible), flesh of the world (sensible only — "pregnancy of possibles"), flesh as element (the general "manner of being")
The invisible is the dimension of the visible, not its negation or its other side
Reversibility is "the ultimate truth" of MP's late ontology — language and perception both rest on it, and there is no synthesis or reconciliation between them
The "barbaric Principle": MP himself uses the term (Schelling's barbarisches Princip) in a November 1960 working note — direct primary-text attestation of the connection

Methodology

The text is methodologically reflexive: it interrogates its own method as part of its argument. The "reduction to the preobjective" (Appendix) is methodologically distinct from Husserl's transcendental reduction in that it does not bracket the world's existence — it brackets the concepts (acts of consciousness, states of consciousness, matter, form, even "perception") that have already prejudged what experience can be. The text proceeds by description (the touching/touched, the red dress, the binocular gaze) rather than by argument from premises, and treats analogies (the orange's two halves, the finger of the glove, the two mirrors facing) as themselves the argument rather than as mere illustration.

The published text was revised many times. It includes three versions of the same Claudel quotation (footnoted by Lefort) — evidence of the unfinished state. The explicit auto-correction of the "Tacit Cogito" of MP's Phenomenology of Perception (in the January 1959 working note) shows that MP had moved decisively beyond his earlier framework.

Concepts Developed

Concepts the source does original work on — its core conceptual contributions:

perceptual-faith — the foundational concept; the structure that any opening upon a world has
flesh-as-element — the central late ontological concept; flesh as a Presocratic "element" of Being
chiasm — the crossing/interlocking structure of seeing-seen, touching-touched; imminent and never realized
reversibility — the structural form of the chiasm; "the ultimate truth"
ecart — divergence as the positive principle of any contact with Being (broader scope than just expression)
dehiscence — the body's "splitting in two" that opens it to itself and to the world
hyper-reflection — reflection that takes its own genesis into account
hyper-dialectic — dialectic without synthesis; dialectic that "envisages without restriction the plurality of the relationships"
visible-invisible — the structure of the title; the invisible as dimension/level/lining of the visible
wild-being — brute, uncultivated being; the project's positive object
philosophy-of-reflection — the target of Ch 1's critique
fundamental-thought-in-art — extended via the Proust passages on the musical idea
intercorporeity — generalized from the body's two-handed reversibility
pregnancy-pragnanz — "power to break forth, productivity (praegnans futuri), fecundity"; the form that "poses itself by its own means, is the equivalent of the cause of itself" (September 1959 working notes)
circulus-vitiosus-deus — MP's own use of Nietzsche's BGE §56 phrase to name the method: "One cannot make a direct ontology. My 'indirect' method... is alone conformed with being — 'negative philosophy' like 'negative theology'" (February 1959 working note)

Concepts Referenced

Concepts the source touches on but does not develop:

lebenswelt — Husserl's concept, MP's positive starting point
barbarian-principle — Schelling's term, used directly by MP in November 1960 note ("the indestructible, the barbaric Principle")
ineinander — Husserlian term MP redeploys for past-present, body-world, visible-invisible mutual inherence
pre-objectivity — the methodological terrain; explicit in the appendix
ontological-difference — invoked critically (Heidegger as background)
seinsgeschichte — Heidegger's history of Being, MP's distance from
natural-symbolism — connection to Schelling/tautegory (mostly via secondary literature)

Key Passages

Direct quotations with locations. Each anchors a core argument or a central concept.

"WE SEE THE THINGS THEMSELVES, the world is what we see: formulae of this kind express a faith common to the natural man and the philosopher—the moment he opens his eyes; they refer to a deep-seated set of mute 'opinions' implicated in our lives. But what is strange about this faith is that if we seek to articulate it into theses or statements, if we ask ourselves what is this we, what seeing is, and what thing or world is, we enter into a labyrinth of difficulties and contradictions." (Ch 1, "The Perceptual Faith and Its Obscurity," p. 3) — anchors the perceptual faith.

"If my left hand is touching my right hand, and if I should suddenly wish to apprehend with my right hand the work of my left hand as it touches, this reflection of the body upon itself always miscarries at the last moment: the moment I feel my left hand with my right hand, I correspondingly cease touching my right hand with my left hand. But this last-minute failure does not drain all truth from that presentiment I had of being able to touch myself touching." (Ch 1, p. 9) — first appearance of the touching/touched, framed as failure.

"the road in the distance has no 'width' one could even ideally calculate; it is as wide as the road close-up, since it is the same road—and it is not as wide, since I cannot deny that there is a sort of shrinking in perspective. Between the road far-off and close-up there is identity and yet μετάβασις εἰς ἄλλο γένος, passage from the apparent to the real, and they are incommensurable." (Ch 1, p. 22) — the road argument against objective psychology of perception.

"we are catching sight of the necessity of another operation besides the conversion to reflection, more fundamental than it, of a sort of hyper-reflection (sur-réflexion) that would also take itself and the changes it introduces into the spectacle into account." (Ch 1, p. 38) — definition of hyper-reflection.

"A philosophy of reflection, as methodic doubt and as a reduction of the openness upon the world to 'spiritual acts,' to intrinsic relations between the idea and its ideate, is thrice untrue to what it means to elucidate: untrue to the visible world, to him who sees it, and to his relations with the other 'visionaries.'" (Ch 1, p. 43) — the threefold critique of reflective philosophy.

"the things attract my look, my gaze caresses the things, it espouses their contours and their reliefs, between it and them we catch sight of a complicity." (Ch 2, p. 76) — the alternative to seer-as-clearing; the "complicity" formula.

"What we call hyperdialectic is a thought that on the contrary is capable of reaching truth because it envisages without restriction the plurality of the relationships and what has been called ambiguity. The bad dialectic is that which thinks it recomposes being by a thetic thought, by an assemblage of statements, by thesis, antithesis, and synthesis; the good dialectic is that which is conscious of the fact that every thesis is an idealization, that Being is not made up of idealizations or of things said, as the old logic believed, but of bound wholes where signification never is except in tendency." (Ch 2, p. 94) — the canonical statement of hyper-dialectic.

"The dialectic without synthesis of which we speak is not therefore scepticism, vulgar relativism, or the reign of the ineffable. What we reject or deny is not the idea of a surpassing that reassembles, it is the idea that it results in a new positive, a new position." (Ch 2, p. 95) — crucial qualification: hyper-dialectic is not relativism.

"Philosophy is the perceptual faith questioning itself about itself. One can say of it, as of every faith, that it is a faith because it is the possibility of doubt... It is not only philosophy, it is first the look that questions the things... we have with our body, our senses, our look, our power to understand speech and to speak, measurants (mesurants) for Being, dimensions to which we can refer it, but not a relation of adequation or of immanence... the existing world exists in the interrogative mode." (Ch 2, p. 103) — the closing definition of philosophy as interrogation.

"There is therefore no need to add to the multiplicity of spatio-temporal atoms a transversal dimension of essences—what there is is a whole architecture, a whole complex of phenomena 'in tiers,' a whole series of 'levels of being,' which are differentiated by the coiling up of the visible and the universal over a certain visible wherein it is redoubled and inscribed." (Ch 3, p. 114) — the architecture of being beyond the fact/essence distinction.

"It is therefore necessary that the deflection (écart), without which the experience of the thing or of the past would fall to zero, be also an openness upon the thing itself, to the past itself, that it enter into their definition... a privative non-coinciding, a coinciding from afar, a divergence, and something like a 'good error.'" (Ch 3, p. 124) — the écart as positive structure of access.

"What we are calling flesh, this interiorly worked-over mass, has no name in any philosophy. As the formative medium of the object and the subject, it is not the atom of being, the hard in itself that resides in a unique place and moment... we must not think the flesh starting from substances, from body and spirit—for then it would be the union of contradictories—but we must think it, as we said, as an element, as the concrete emblem of a general manner of being. To begin with, we spoke summarily of a reversibility of the seeing and the visible, of the touching and the touched. It is time to emphasize that it is a reversibility always imminent and never realized in fact." (Ch 4, p. 147) — the flesh as element AND the crucial qualification of reversibility.

"What we are calling flesh, this interiorly worked-over mass, has no name in any philosophy... To designate it, we should need the old term 'element,' in the sense it was used to speak of water, air, earth, and fire, that is, in the sense of a general thing, midway between the spatio-temporal individual and the idea, a sort of incarnate principle that brings a style of being wherever there is a fragment of being. The flesh is in this sense an 'element' of Being. Not a fact or a sum of facts, and yet adherent to location and to the now. Much more: the inauguration of the where and the when, the possibility and exigency for the fact; in a word: facticity, what makes the fact be a fact." (Ch 4, p. 139-140) — the canonical definition of flesh as element.

"Reversibility: the finger of the glove that is turned inside out—There is no need of a spectator who would be on each side. It suffices that from one side I see the wrong side of the glove that is applied to the right side, that I touch the one through the other (double 'representation' of a point or plane of the field) the chiasm is that: the reversibility... It is through it alone that there is passage from the 'For Itself' to the For the Other—In reality there is neither me nor the other as positive, positive subjectivities. There are two caverns, two opennesses, two stages where something will take place—and which both belong to the same world... Start from this: there is not identity, nor non-identity, or non-coincidence, there is inside and outside turning about one another." (Working note, November 16, 1960) — the most concentrated formulation of the chiasm.

"With the first vision, the first contact, the first pleasure, there is initiation, that is, not the positing of a content, but the opening of a dimension that can never again be closed, the establishment of a level in terms of which every other experience will henceforth be situated. The idea is this level, this dimension. It is therefore not a de facto invisible, like an object hidden behind another, and not an absolute invisible, that would have nothing to do with the visible. Rather it is the invisible of this world, that which inhabits this world, sustains it, and renders it visible, its own and interior possibility, the Being of this being." (Ch 4, p. 151) — the invisible as dimension.

"And what we have to understand is that there is no dialectical reversal from one of these views to the other; we do not have to reassemble them into a synthesis: they are two aspects of the reversibility which is the ultimate truth." (Ch 4, p. 155) — closing line of the chapter; reversibility as the ultimate truth.

"'Nature is at the first day': it is there today. This does not mean: myth of the original indivision and coincidence as return. The Urtümlich, the Ursprünglich is not of long ago. It is a question of finding in the present, the flesh of the world (and not in the past) an 'ever new' and 'always the same'... Existential eternity. The indestructible, the barbaric Principle. Do a psychoanalysis of Nature: it is the flesh, the mother. A philosophy of the flesh is the condition without which psychoanalysis remains anthropology." (Working note, November 1960) — direct attestation of "the barbaric Principle" in MP's own voice; the connection to Schelling.

"The Id, the unconscious—and the Ego (correlative) to be understood on the basis of the flesh." (Working note, December 1960) — the flesh as the framework for psychoanalysis.

"This unconscious is to be sought not at the bottom of ourselves, behind the back of our 'consciousness,' but in front of us, as articulations of our field. It is 'unconscious' by the fact that it is not an object, but it is that through which objects are possible, it is the constellation wherein our future is read." (Working note, February 1959) — the unconscious as field-structure, not hidden representation.

"One cannot make a direct ontology. My 'indirect' method (being in the beings) is alone conformed with being—'negative philosophy' like 'negative theology.'" (Working note, February 1959) — circulus vitiosus deus applied; the indirect method.

"Discovery of the (verbal) Wesen: first expression of the being that is neither being-object nor being-subject, neither essence nor existence: what west answers the question was as well as the question dass." (Working note, February 1959) — Heidegger's verbal Wesen developed.

"Pregnancy: the psychologists forget that this means a power to break forth, productivity (praegnans futuri), fecundity—Secondarily: it means 'typicality.' It is the form that has arrived at itself, that is itself, that poses itself by its own means, is the equivalent of the cause of itself." (Working note, September 1959) — pregnancy as self-positing, not Gestalt typicality.

"My body is a Gestalt and it is co-present in every Gestalt. It is a Gestalt; it also, and eminently, is a heavy signification, it is flesh." (Working note, September 1959) — the body as Gestalt; bridge from phenomenological to ontological register.

"Take topological space as a model of being. The Euclidean space is the model for perspectival being... The topological space, on the contrary, a milieu in which are circumscribed relations of proximity, of envelopment, etc. is the image of a being that... is at the same time older than everything and 'of the first day.'" (Working note, October 1959) — topological space as the spatial model of wild being.

"Each 'sense' is a 'world'... absolutely incommunicable for the other senses, and yet constructing a something which, through its structure, is from the first open upon the world of the other senses, and with them forms one sole Being... Perception is not first a perception of things, but a perception of elements (water, air...) of rays of the world, of things which are dimensions, which are worlds." (Working note, November 1959) — sensoriality as dimensionality; "total parts."

"The fact that one no longer sees the memory = not a destruction of a psychic material... but its disarticulation which makes there be no longer a separation (écart), a relief. This is the night of forgetting." (Working note, May 1959) — forgetting as loss of écart; perception-as-differentiation thesis.

"Chiasm, instead of the For the Other: that means that there is not only a me-other rivalry, but a co-functioning. We function as one unique body." (Working note, November 1, 1959) — chiasm as co-functioning, one year before Ch 4.

"The soul is planted in the body as the stake in the ground... The soul is the hollow of the body, the body is the distention of the soul." (Working note, January 1960) — soul-body as convex-concave.

What's Not Obvious

Three things about this text that would not appear in a conventional summary or book review:

The chiasm is non-coincidence, not even partial coincidence. Most readings of MP's late ontology present the chiasm as the achievement of unity (or near-unity) between sensing and sensed. The primary text says the opposite: "It is time to emphasize that it is a reversibility always imminent and never realized in fact" (Ch 4, p. 147). "My left hand is always on the verge of touching my right hand touching the things, but I never reach coincidence; the coincidence eclipses at the moment of realization" (Ch 4, p. 148). The hiatus is not "an ontological void" but "the zero of pressure between two solids that makes them adhere to one another" (Ch 4, p. 148). This anchors a structural reading of the chiasm against any reading that would fuse it with mystical-identity language. It also forms a load-bearing connection to ecart: the chiasm is constitutively écart, never overcome.
MP explicitly disowns the "Tacit Cogito" of his own Phenomenology of Perception. The January 1959 working note: "What I call the tacit cogito is impossible. To have the idea of 'thinking' (in the sense of the 'thought of seeing and of feeling'), to make the 'reduction,' to return to immanence and to the consciousness of... it is necessary to have words. It is by the combination of words... that I form the transcendental attitude... There are only differences between significations." This is one of the most striking auto-corrections in the entire MP corpus, and it determines the trajectory of the late ontology: the move from a phenomenology of consciousness to an ontology of language and flesh. It is invisible in the published text and accessible only through the working notes — which is why Lefort's decision to include them was load-bearing for the text's reception.
MP himself uses Schelling's term "the barbaric Principle" in his own voice. The November 1960 working note: "Do a psychoanalysis of Nature: it is the flesh, the mother... The indestructible, the barbaric Principle." This is direct primary-text attestation of the connection between MP's late ontology and Schelling's Naturphilosophie — a connection the wiki barbarian-principle page had inferred from secondary sources (Knight, Gardner). The note also explicitly connects the flesh to the unconscious ("psychoanalysis of Nature") and to the maternal — a thematic register MP develops in the December 1960 note "The Id, the unconscious... to be understood on the basis of the flesh." These connections suggest that MP was working toward a synthesis of phenomenology, Naturphilosophie, and psychoanalysis that he did not live to articulate. The wiki concept page barbarian-principle should now be updated with this direct primary-text use.

Critique / Limitations

The text's incompleteness is its central limitation. We have only the introductory section ("Philosophical Interrogation") of a much larger work that would have addressed Nature and Logos in full. The constructive chapter (Ch 4) introduces the concepts (flesh, chiasm, reversibility, the visible/invisible) but does not exhaust them — they are emblems and figures (the touching/touched, the orange's two halves, the finger of the glove) more than they are arguments from premises. Many of the most concentrated formulations exist only in the working notes and have the character of memoranda rather than worked-out positions.

Specific weaknesses:

The transition from intracorporeal to intercorporeal reversibility is asserted, not earned. MP writes: "If my left hand can touch my right hand while it palpates the tangibles... why, when touching the hand of another, would I not touch in it the same power to espouse the things that I have touched in my own?" But the analogy is weak: my two hands belong to one body that I never see in mirror-form, while the other person's hand belongs to a body whose interior I never have. The "very peculiar relation" between my two hands is precisely what I do not have with the other.
The relation between the flesh-of-the-body and the flesh-of-the-world is named rather than explained. The May 1960 note acknowledges this directly: "the flesh of the world is not explained by the flesh of the body, nor the flesh of the body by the negativity or self that inhabits it—the 3 phenomena are simultaneous." This sidesteps the question rather than answering it.
The privilege of perception as the archetype of all encounter with being is presupposed, not argued. Why perception rather than language, or pain, or agency?
The two-handed structure of the body bears unexpected philosophical weight. Why should this contingent fact of human anatomy be the paradigm of the chiasm? MP doesn't address this.

These limitations are inseparable from the text's method: the constructive ontology is an ontology of emblems, of figures, of "things one finds when one looks closely." It does not aspire to the form of an axiomatic system. Whether this is a limitation or a feature depends on one's view of what philosophy can be.

Connections

culminates merleau-ponty-2022-possibility-of-philosophy — the same period (1959-1961); some lecture passages and working notes overlap thematically
develops further merleau-ponty-2022-possibility-of-philosophy's "philosophy and non-philosophy" theme — Ch 2's hyper-dialectic is the systematic version of what the lecture courses gesture at
critiques Sartre, Being and Nothingness — Ch 2 is the most sustained engagement with Sartre in MP's corpus
critiques Husserl on Wesensschau and on the transcendental reduction — Ch 1 and Ch 3 (while continuing to use Husserl's concepts of Lebenswelt, Ineinander, Selbstgegeben, etc.)
critiques Bergson on intuition as coincidence — Ch 3
extends MP's earlier Phenomenology of Perception — but with explicit auto-correction (the "Tacit Cogito" disowned in January 1959 working note)
parallels Heidegger's later thought (the "ontological difference," Wesen as verb) — Heidegger is the most-cited contemporary ontologist in the working notes
develops the same problematic as chouraqui-2016-order-of-the-earth — Chouraqui's "Order of the Earth" reading is built on the texts in V&I and Possibility of Philosophy
is the primary source for knight-2024-merleau-ponty-essence-of-nature — Knight's reading of the chiasm, flesh-as-element, and natural symbolism is anchored here
is connected via Schelling to gardner-2016-kant-third-critique-schelling, gardner-2018-thoughts-indebtedness-to-being — Gardner's German Idealism background reading