So we go around pigeonholing everything. We put cows in cowsheds, horses in stables, pigs in pigsties, and chickens in chicken coops. The same happens when Sophie Amundsen tidies up her room. She puts her books on the bookshelf, her schoolbooks in her schoolbag, and her magazines in the drawer. She folds her clothes neatly and puts them in the closet - underwear on one shelf, sweaters on another, and socks in a drawer on their own. Notice that we do the same thing in our minds. we distinguish between things made of stone, things made of wool, and things made of rubber. We distinguish between things that are alive or dead, and we distinguish between vegetables, animal, and human

Author: Jostein Gaarder