Oliver Sacks, Seeing Voices

“As our central nervous system—and most particularly its crowning curse and glory, the neocortex—grew up in great part in interaction with culture, it is incapable of directing our behavior or organizing our experience without the guidance provided by systems of significant symbols.… We are, in sum, incomplete or unfinished animals who complete or finish ourselves through culture (Geertz, 1973, p. 49).

― Oliver Sacks, Seeing Voices