We seldom realize, for example, that our most private thoughts and emotions are not actually our own. For we think in terms of languages and images which we did not invent, but which were given to us by our society. We copy emotional reactions from our parents, learning from them that excrement is supposed to have a disgusting smell and that vomiting is supposed to be an unpleasant sensation. The dread of death is also learned from their anxieties about sickness and from their attitudes to funerals and corpses. Our social environment has this power just because we do not exist apart from a society. Society is our extended mind and body.

The Book on the Taboo Against Knowing Who You Are (1966)