" When I certify someone insane, I am not equivocating when I write that he is of unsound mind, may be dangerous to himself and others, and requires care and attention in a mental hospital. However, at the same time, I am also aware that, in my opinion, there are other people who are regarded as sane, whose minds are as radically unsound, who may be equally or more dangerous to themselves and others and whom society does not regard as psychotic and fit persons to be in a madhouse. "

― R.D. Laing , The Divided Self: An Existential Study in Sanity and Madness