Idios kosmos

Idios kosmos is people's "own world" or "private world" as distinguished from the "common world". The origin of the term is attributed to fragment B89 of the pre-Socratic philosopher Heraclitus: "The waking have one common world, but the sleeping turn aside each into a world of his own." The term has various interpretations: idios kosmos is associated with dreaming, imagination, and delusion; koinos kosmos with wakefulness, reason, and consensus reality.

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