Heidegger's concept of Eigentlichkeit (authenticity, literally "ownedness") in "Being and Time" describes a mode of
existence in which Dasein takes
ownership of its own being — its thrownness, its facticity, its being-toward-death — rather than losing itself in the anonymous "das Man" (the they-self). Authenticity is not a permanent achievement but a possibility that must be continually renewed. Sartre's existentialist account of authenticity involves acknowledging radical freedom and responsibility rather than fleeing into bad faith. Beauvoir extends authenticity to the social domain: genuine authenticity cannot be achieved in isolation from others and requires the
recognition of others' freedom. For poets, authentic being is both a personal and a literary
challenge — the authentic poem cannot merely reproduce inherited conventions but must genuinely confront the poet's own situation. Related terms: inauthenticity, das Man, bad faith, thrownness, being-toward-death, existentialism.