Where perception of objects is concerned, Edelman likes to say, the world is not "labeled"; it does not come "already parsed into objects." We must make our perceptions through our own categorizations. "Every perception is an act of creation," as Edelman says. As we move about, our sense organs take samplings of the world, and from these, maps are created in the brain. There then occurs with experience a selective strengthening of those mappings that correspond to successful perceptions-successful in that they prove the most useful and powerful for the building of "reality.
( Oliver Sacks )
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