Anyone who would go to a psychiatrist ought to have his head examined!
Source, in full
Reported in Paul F. Boller, John George, They Never Said It (1990), p. 42. A similar quote appears in the landmark book by Hollingshead and Redlich, Social Class and Mental Illness (1958), p. 237: The old saw, 'Anyone who goes to a psychiatrist should have his head examined,' is applicable here.