In Greek philosophy knowing the truth was itself an ethical and political act

Evidence

In classical Greek philosophy, Reason is the cognitive faculty to distinguish what is true and what is false insofar as truth (and falsehood) is primarily a condition of Being, of Reality—and only on this ground a property of propositions. True discourse, logic, reveals and expresses that which really is—as distinguished from that which appears to be (real). And by virtue of this equation between Truth and (real) Being, Truth is a value, for Being is better than Non-Being. The latter is not simply Nothing; it is a potentiality of and a threat to Being—destruction. The struggle for truth is a struggle against destruction, for the “salvation” (σώζειν) of Being (an effort which appears itself to be destructive if it assails an established reality as “untrue”: Socrates against the Athenian city state). Inasmuch as the struggle for truth “saves” reality from destruction, truth commits and engages human existence. It is the essentially human project. If man has learned to see and know what really is, he will act in accordance with truth. Epistemology is in itself ethics, and ethics is epistemology. — Herbert Marcuse, One-Dimensional Man, 491

Categorization

• DEFINE: Clarifies that truth in classical thought was ontological (a condition of Being) before it was propositional — key for understanding Marcuse’s critique of one-dimensionality.
• XREF: The claim ‘epistemology is in itself ethics’ is the philosophical backbone for attention-economy critiques — knowledge practices are value-laden, a line later thinkers like Foucault and the surveillance critics extend. — connects to: Objectivist truth served as philosophy’s safeguard against the intoxication of power — Bertrand Russell, History of Western Philosophy, 2943; Hellenistic political impotence shifted philosophical focus from metaphysics to individual ethics — Bertrand Russell, History of Western Philosophy, 946; German idealism legitimated knowledge by unifying truth and justice in a single subject — Jean-François Lyotard, The Postmodern Condition: A Report on…, 268 (+7 more)

Broader Connections

• German idealism legitimated knowledge by unifying truth and justice in a single subject #expands (0.80) — Jean-François Lyotard, The Postmodern Condition, 268
• Objectivist truth served as philosophy’s safeguard against the intoxication of power #expands (0.78) — Bertrand Russell, History of Western Philosophy, 2943
• Reason was originally conceived as a subversive power that transforms reality toward truth #expands (0.75) — Herbert Marcuse, One-Dimensional Man, 487
• The truth of ideas is independent of their social origins #contradicts (0.75) — Georg Simmel, on individuality and social forms_…, 210
• Life’s needs rather than independent reason determine what counts as truth #contradicts (0.74) — Georg Simmel, on individuality and social forms_…, 857
• The eclipse of the City State shifted Greek philosophy toward individual salvation #qualifies (0.74) — Bertrand Russell, History of Western Philosophy, 950
• Hellenistic political impotence shifted philosophical focus from metaphysics to individual ethics #complicates (0.72) — Bertrand Russell, History of Western Philosophy, 946
• Philosophy works by replacing one common sense with another aligned to the ruling group #contradicts (0.72) — Antonio Gramsci, Selections from the Prison Notebooks, 1507
• Descartes’ indubitable ‘I’ redirected philosophy inward toward certainty of the self. #responds-to (0.72)
• Investigation transferred truth-finding authority from God and community to the sovereign state #complicates (0.72) — Michel Foucault, Discipline & Punish- The Birth of the…, 351