The left hemisphere seems to accept the permanence of something only if it is static. But things can change – flow – and yet have permanence: think of a river. The right hemisphere perceives that there is permanence even where there is flow.
McGilchrist argues that the two cerebral hemispheres hold fundamentally different models of permanence — the left requiring stasis, the right capable of recognising continuity within change — with direct pathological consequences when the right is damaged.
, The Master and His Emissary: The Divided Brain and the Making of the Western World, 2009thesis