Carl Linnaeus — "When all the thoughts are concerning one thing and the person loses interest in …"
When all the thoughts are concerning one thing and the person loses interest in other things, the melancholy begins.
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More from Carl Linnaeus
"If you want to know yourself, study nature."
"It is not God, but people themselves who shorten their lives by not keeping physically fit."
"The knowledge of plants is a science, but the knowledge of their names is a pleasure."
"To live by medicine is to live horribly."
"The stony rocks are not primeval, but daughters of Time."
About Carl Linnaeus (1707-1778)
Swedish botanist and the father of modern taxonomy whose Systema Naturae (1735) introduced binomial nomenclature for naming all species. Closely associated with Joseph Banks (British naturalist who carried Linnaean classification on Cook's voyages). For an intellectual contrast, see Comte de Buffon, French naturalist and Histoire Naturelle author (1749-1788) — Buffon explicitly attacked Linnaean fixed-categories taxonomy as artificial and rejected the binomial system; his gradualist, environment-shaped natural history was the explicit alternative. Anticipates the fixed-species-vs-evolution debate Darwin would later resolve.
Details
A psychological observation on the nature of obsession and its link to melancholy.
Date: 18th Century
PhilosophicalVerification
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Understanding this quote
What it means
When a person becomes consumed by a single obsession and withdraws from broader life, depression takes root. Total fixation—whether on grief, failure, or even passion—narrows the mind until nothing else holds appeal. Mental health requires varied engagement with the world; tunnel vision of thought signals the beginning of a dangerous emotional decline.
Relevance to Carl Linnaeus
Linnaeus devoted his life to classifying all of nature, an all-consuming intellectual mission that often isolated him. He suffered documented episodes of depression and physical illness from overwork. This observation likely emerged from personal experience—recognizing how his own singular obsession with taxonomy could border on unhealthy fixation, straining his relationships and health.
The era
In 18th-century Europe, melancholy was a recognized medical concept rooted in humoral theory, viewed as excess black bile affecting scholars and thinkers especially. The Enlightenment era celebrated singular genius and deep specialization, yet physicians increasingly noted that obsessive scholarly devotion produced psychological breakdown. Linnaeus wrote amid this tension between intellectual ambition and mental wellbeing.
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