"This is unquestionably a fairly typical case of a now often described mental disorder. The peculiarities of this special case lie largely in the powers of the genius who here suffered from the malady. A man of sensitive and probably somewhat burdened nervous constitution... is beset in childhood with frequent nocturnal and even diurnal terrors of a well-known sort. In youth, after an early marriage, under the strain of a life of poverty and of many religious anxieties, he develops elementary insistent dreads of a conscientious sort, and later a collection of habits of questioning and of doubt which... pass the limits of the normal. His general physical condition meanwhile failing, in a fashion that... appears to be of some neurasthenic type, there now appears a highly systematized mass of [painful] insistent motor-speech functions... accompanied with still more of the same fears, doubts, and questions. After [an] extended period, after one remission, and also after a decided change in the... insistent elements, the malady... rapidly approaches a dramatic crisis, which leaves the sufferer... in [an extended, but somewhat benign] condition of secondary melancholic depression... a depression from which, owing to a deep change of... mental habits, and [improved] physical condition, he... emerges cured, although with... his greatest enemy—systematized insistent impulses. This entire morbid experience has lasted some four years. Henceforth, under a skillful self-imposed mental regimen, this man, although always a prey to elementary insistent temptations and to fits of deep depression of mood, has no return of his more systematized disorders, and endures heavy burdens of work and of fortune with excellent success. Such is the psychological aspect of a story whose human and spiritual interest is and remains of the very highest."
John Bunyan

January 1, 1970