Misfortune and misery are very potent in turning people's heads, and drive one person to the lunatic asylum, and another to the morgue or the gallows.
 Jack London, The People of the Abyss (1903). copy citation

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Author Jack London
Source The People of the Abyss
Topic misery misfortune
Date 1903
Language English
Reference
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Weblink https://en.wikisource.org/wiki/The_People_of_the_Abyss

Context

“On the other hand, of soldiers, who are at least sure of food and shelter, 13 per 10,000 go insane; and of farmers and graziers, only 5.1. So a coster is twice as likely to lose his reason as a soldier, and five times as likely as a farmer.
Misfortune and misery are very potent in turning people's heads, and drive one person to the lunatic asylum, and another to the morgue or the gallows. When the thing happens, and the father and husband, for all of his love for wife and children and his willingness to work, can get no work to do, it is a simple matter for his reason to totter and the light within his brain go out.” source