Erich Fromm said this quote
“ Indeed, with the experience of self disappears the experience of identity - and when this happens, man could become insane if he did not save himself by acquiring a secondary sense of self; he does that by experiencing himself as being approved of, worthwhile, successful, useful - briefly, as a salable commodity which is he because he is looked upon by others as an entity, not unique but fitting into one of the current patterns. ”