Mentally ill people are lazy, and if they would get a job, they would get better. All mentally ill people are creative. Mental illness and mental retardation are the same. Mental illness can't be treated successfully. Treatment of mental illness requires years of frequent, intensive psychotherapy, and even if this is provided, treatment is not usually successful.
Mental illness is a moral failing, a divine punishment, or demon possession.
If mentally ill people really wanted to, they could get better just by applying some old-fashioned will power.