Sureness

"....Anthropologists found that schizophrenia is strongest among those whose ties with the cultural traditions are weakest: drug users, intellectuals, immigrants, students in their first year at college, soldiers recently inducted.

A study of Norwegian-born immigrants in Minnesota showed that over a period of four decades their rate of hospitalization for mental disorders was much higher than those for either non-immigrant Americans or Norwegians in Norway. Isaac Frost found that psychoses often develop among foreign domestic servants in Britain, usually within eighteen months of their arrival.

These psychoses, which are an extreme form of culture shock, emerge among these people because the cultural definition of values which underlies their sanity has been changed. It was not an awareness of 'truth' that was sustaining their sanity, it was their sureness of their cultural directives."

Page 387.
'Lila. An Inquiry into Morals'
Robert M Pirsig