The psychiatrist Koch sought to make the moral insanity concept more scientific and suggested in 1891 the phrase 'psychopathic inferiority' (later personality) be used instead. This referred to continual and rigid patterns of misconduct or dysfunction in the absence of apparent mental retardation or illness. The diagnosis was meant to imply a congenital disorder, and to be made without moral judgement, though Koch has been described as deeply rooted in a Christian faith. Toward the mid 20th century the terminology of the 'psychopathic' would become specifically associated with an aggressive and anti-social personality. A more general concept of character disorders came into use by psychoanalysts, and psychiatry later adopted the current terminology of personality disorders.