I do say, lying is insanity; and if I can ever be proved to be a liar, by my own words or actions, I do insist upon it I merit the charge put upon me of monomania, or insanity.
"Marital Power Exemplified in Mrs. Packard's Trial, and Self-Defence from the Charge of Insanity"
Elizabeth Parsons Ware Packard
It in fact represents a form of monomania connected with a certain idea.
"The Literature of Ecstasy"
Albert Mordell
Scientific research, that is, revealed itself to contemporaries as a childish and absurd monomania, unworthy of a man of sense.
"English Literature and Society in the Eighteenth Century"
Leslie Stephen