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third-dimension
The Sphere introduces the idea of a third spatial dimension, beyond the two dimensions known to Flatlanders, which cannot be perceived directly by them.
1 chapter across 1 book
Flatland: A Romance of Many Dimensions (2018)Edwin A. Abbott
PART II: OTHER WORLDS
The chapter explores the narrator's encounters with beings from different dimensional worlds, beginning with Lineland, a one-dimensional realm whose inhabitants cannot comprehend higher dimensions. The narrator then meets a Sphere from the three-dimensional Spaceland, who reveals the existence and nature of the third dimension, challenging the narrator's and Flatland society's limited perceptions. Despite gaining profound insights, the narrator faces societal repression for his knowledge, culminating in his imprisonment and enduring hope for future enlightenment.