Sextus Empiricus
To every thesis, an opposing one of equal strength: wisdom .
Greek · 160 – 210
A physician of the Empiric school and a Greek philosopher of the 2nd-3rd centuries, of whom almost nothing is known beyond his works. He is the chief source that transmitted Pyrrhonian to us, the current inspired by of Elis and systematized by and then . His and his preserve the complete arsenal of , those patterns of opposition by which the skeptic balances the arguments of the , Stoic and Epicurean alike. Presenting skepticism not as a doctrine but as a "way" and an art of living, he nourished, on his rediscovery in the Renaissance, the doubt of and then, by reaction, the quest for certainty of .
To every thesis answers a contrary one of equal strength: unable to decide, , and do not even assert that nothing can be known.
Do not seek tranquillity: follows of itself upon the suspension of judgment, as a shadow follows the body.
Nothing shows itself good or bad by nature: faced with the endless diversity of customs, suspend your judgment and live by the law of your country without believing it true.
One can establish neither that the gods exist nor that they do not: honor them by custom, and suspend your judgment on their nature.
Do not grant your to the non-evident: while the reasons stay balanced, to believe would be to rush.
Justification
The skeptic observes that to every assertion an assertion of equal strength can be opposed: this is the (isostheneia) of contrary reasons. Having no means to decide, he (epoche), not by choice but because the unresolved conflict compels him to. Sextus systematizes this mechanism in the inherited from and , which drive every claim to knowledge toward infinite regress, circularity, or an arbitrary stopping point. Where would make doubt a stage toward a foundation, Sextus makes it a dwelling: no definitive certainty is attainable, and the skeptic carries caution so far as not even to assert dogmatically that there is no certainty.
To every argument an equal argument is opposed.Outlines of Pyrrhonism, I, 12
Outlines of Pyrrhonism, I, 8 and 12 · Outlines of Pyrrhonism, I, 164-169 (the five modes of Agrippa)
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Far from choosing between foundationalism, coherentism and reliabilism, Sextus turns the very of against all three: every justification stops at an unproven hypothesis, turns in a circle, or runs off to infinity. To ascribe a theory of justification to him would betray the skepticism whose whole point is to validate none.
Sextus suspends judgment on the very nature of truth: he sets the dogmatic theories of the true against one another without adopting any, whether by correspondence, coherence or otherwise. He distinguishes what appears (the phenomenon, which he does not contest) from what would be true "by nature", on which he takes no stand.
Whether a science reaches the real or constructs it presupposes an access to the real "as it is" that the skeptic rejects as undecidable. Sextus holds to appearances and suspends any verdict on what theories do or do not capture of the world.
Justification
A physician of the Empiric school, nicknamed "the Empiric", Sextus takes as his sole guide in life what shows itself: the (phainomena), the affections, the repeated observation proper to the arts. But this empiricism carries no dogma: he does not assert that the senses deliver the real, only that they deliver what appears, the one ground on which the skeptic consents to move. Against the that claims to infer the hidden from signs, he refuses any passage from the apparent to the non-apparent. His leaning is thus empiricist, but held short of the extreme, for he founds no theory of knowledge at all.
Outlines of Pyrrhonism, I, 21-24 (the criterion of the phenomenon) · Against the Mathematicians, VIII (Against the Logicians)
Justification
The skeptic's first move is to withhold from whatever is not self-evident: while the reasons remain balanced, to grant belief would be rash. This restraint meets the evidentialist spirit, to believe in proportion to the reasons. The Pyrrhonian nuance is that he suspends even where the dogmatist believes he has proofs, and that he makes of this restraint not a moral duty but the lived effect of the balance of arguments: not a duty to believe only the proven, but the impossibility of assenting when nothing tips the scale.
Outlines of Pyrrhonism, I, 13 (assent) · Outlines of Pyrrhonism, I, 19-20
Justification
The end the skeptic aims at is , the absence of disturbance in matters of opinion, together with , the moderation of unavoidable feelings. But the remarkable trait is that it is not pursued as a good by nature, which would already be a dogmatic thesis: Sextus reports that tranquillity supervenes on whoever suspends judgment, as a shadow follows a body, by a chance the skeptic notes only after the fact. This is neither the hedonism of pleasure nor the perfectionism of virtue, but a happy form of life reached by subtraction, by ceasing to hold things good or bad in themselves.
Tranquillity followed the suspension of judgment as a shadow follows its body.Outlines of Pyrrhonism, I, 29
Outlines of Pyrrhonism, I, 25-30 (the goal of skepticism)
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Justification
The torment of desire comes, for Sextus, from holding certain objects to be good or bad by nature: one pursues or flees them with vehemence, and is disturbed. By suspending this value judgment one is freed from anxious pursuit, without aiming at the complete Stoic extinction of feeling. The skeptic keeps the natural inclinations, hunger, thirst, and answers them with measure: a detachment from supposed goods, tempered by acceptance of the unavoidable affections, which holds him a little short of strict asceticism.
Outlines of Pyrrhonism, I, 25-30 · Outlines of Pyrrhonism, III, 235-238
Justification
The skeptic holds that the greater part of suffering comes not from the affections themselves but from the added opinion that they are evils by nature: it is this belief that doubles a pain with moral distress. To withdraw the judgment lightens it accordingly: the forced pain remains, but the surplus of anguish is removed. The position meets the "median" indifference toward the meaning of suffering, neither fruitful nor to be abolished on principle, but defused by suspending the value judgment.
Outlines of Pyrrhonism, I, 25-30 · Outlines of Pyrrhonism, III, 235-238
Justification
Hope, like fear, bears on a future held good or bad by anticipation: yet it is precisely this judgment on the non-evident to-come that the skeptic suspends. With no dogma about what tomorrow must bring, he does not hang his rest on an expectation, and welcomes what presents itself. The tone is thus one of tranquil lucidity rather than a principle of hope, yet without tragic despair, foreign to one who has given up judging the future.
Outlines of Pyrrhonism, I, 25-30
Justification
Skepticism is first an activity of examination: skepsis is inquiry, an attentive weighing of opposed reasons before any suspension. This reflective discipline, turned toward the testing of opinions rather than the world-transforming deed, leans toward the examined life. But it stops short of moral interiority in the Socratic sense, for the skeptic has no doctrine of the self to deepen: an examination without metaphysical introspection.
Outlines of Pyrrhonism, I, 1-4 (the three kinds of philosophy)
Every theory of the self, substance, continuity, bundle, is a thesis on what the soul would be by nature; the skeptic sets it against its rivals and suspends. Sextus speaks of the human being and its affections at the level of the phenomenon, with no doctrine of personal identity.
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Justification
In his ethical books, Sextus sets the inexhaustible diversity of peoples' laws, customs and beliefs against the claim that anything is good or bad "by nature": were anything so, all would hold it such. Lacking a criterion, he on the existence of universal norms and regulates his conduct by the "law and custom" of his country, without holding them true. From this relativism-by-suspension follows a null universalism and only a thin constructivism, since following convention is not grounding it: it is conforming to it in the absence of any established moral truth.
Outlines of Pyrrhonism, III, 168-238 (things good and bad) · Outlines of Pyrrhonism, I, 145-163 (the tenth mode, on customs)
Justification
Having no truth in whose name to reform the established order, the skeptic regulates himself by default on the laws, customs and received institutions of his country, which he observes without dogmatic belief. This conformism is conservative by abstention rather than conviction: not love of tradition, but the absence of any criterion that would justify overturning it. The position thus leans conservative, but without the value-grounding a Burke would give it.
Outlines of Pyrrhonism, I, 17 and 23-24 (following law and custom)
Justification
Sextus lines up the dogmatists' arguments for and against the existence of the gods, shows that they balance, and concludes to suspension: one can establish neither that the gods exist nor that they do not. More radical than ordinary agnosticism, which asserts undecidability as a thesis, he will not even rule for the unknowable. In practice, however, following custom, he says the gods exist, honors them and holds them provident, without dogma. It is this lived suspension, not a doctrinal agnosticism, that the median position marks here.
Outlines of Pyrrhonism, III, 2-12 (on the gods) · Against the Mathematicians, IX, 13-194
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Justification
Sextus shares with the Stoics the idea that disturbance arises from a judgment, the opinion that a thing is good or bad by nature, and that withdrawing that judgment brings calm. This is an intellectualism of the passions: the cure runs through the suspension of opinion. But he parts from them on one decisive point: he does not suppress all feeling, granting that the skeptic still suffers cold or thirst, "forced" affections that no suspension abolishes. Hence a clearly intellectualist position, held back from the extreme by this share of irreducible affect.
Outlines of Pyrrhonism, I, 25-30 · Outlines of Pyrrhonism, III, 235-238
To locate the sacred in immanence or transcendence presupposes a thesis on the nature of the divine, which Sextus precisely suspends (see GOD_EXISTENCE). He follows worship by custom without deciding anything about the nature of what he honors.
Materialism, idealism and dualism are so many theses on the real "by nature", which the skeptic sets against one another in order to suspend judgment. He grants the phenomenon, never a metaphysics of the ground of the real.
Sextus devotes a tight critique to the notion of cause and to the inference from sign to thing signified, concluding that no causal explanation of the hidden can be established. To decide between mechanism, finalism and vitalism would thus be to adopt the dogmatism he refutes.
An anachronistic question: nothing in Sextus's corpus allows positioning him on machine thought without hazardous extrapolation.
Suspending judgment: epochēRuleRelation to certainty
Set against every certainty its opposite; unable to decide, suspend.
The set against every thesis a contrary thesis of equal strength (); unable to decide, they suspended judgment, , and found in that suspense an unexpected tranquility, . This rule takes up their gesture: faced with a certainty sweeping you along, building the opposing case yourself, weighing it, and agreeing not to conclude. Today it defuses the flare-ups and quarrels where one defends an opinion more than one examines it.
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Weighing the opposite case: equipollenceExerciseRelation to certainty
recorded the method of the ancient skeptics: to any assertion, set a contrary argument of equal strength, until the two come into balance, . This exercise takes up that gesture as a discipline: not to reach a conclusion, but to build with your own hands the strongest case against an opinion that grips you too tightly. As the scales even out, the hold of the forced opinion loosens, and becomes possible. Today it softens the certainties one has locked oneself into without truly examining them.
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