"Therefore, in medicine we ought to know the causes of sickness and health"
About this Quote
The phrase “ought to know” is quietly radical. It’s normative, almost moral. A physician who can stop a fever by luck or habit is not yet doing medicine in the full sense; the profession earns legitimacy by pursuing causality. That subtext elevates the doctor from technician to investigator and makes medicine a branch of disciplined reasoning, aligned with his broader project in The Canon of Medicine: systematize observation, logic, and existing learning into a coherent framework.
“Causes of sickness and health” also widens the aperture. He’s not satisfied with disease as an isolated event. Health becomes equally explicable, something with determinants worth studying - diet, environment, temperament, regimen. The move is strategic: if you understand health’s causes, prevention becomes as intellectually serious as cure, and the physician’s authority extends into everyday life.
Context sharpens the intent. Avicenna stands at a crossroads of Greek medical theory (especially Galen), Islamic scholarship, and his own metaphysical commitments. Cause, for him, isn’t only correlation; it’s structure. The quote reads like a manifesto for medicine as rational culture, not just emergency service.
Quote Details
| Topic | Health |
|---|---|
| Source | Verified source: The Canon of Medicine (Avicenna, 1025)
Evidence: Therefore in medicine we ought to know the causes of sickness and health. (Book I, opening section on the definition and causes in medicine; exact page varies by edition). This wording is attested in an English translation/excerpt of Avicenna's own medical work, identified there as 'On Medicine, c. 1020 CE.' The excerpt is sourced by Fordham from Charles F. Horne, ed., The Sacred Books and Early Literature of the East (1917), vol. VI, pp. 90-91, and presents a passage from Avicenna's Canon of Medicine. The quote is therefore not from a modern quotation collection originally, but from Avicenna's primary medical text (Arabic: al-Qanun fi al-Tibb), composed circa 1025 CE. Because Avicenna wrote in Arabic, this exact English sentence is a translation, not the original-language wording. I could verify the primary work and approximate location within Book I, but page numbers depend on the specific edition/translation. Other candidates (1) Lifelines in World History (Ase Berit, Rolf Strandskogen, 2015) compilation95.0% ... Avicenna's practical discoveries in medicine were far reaching, but his fundamental approach to medicine was ... ... |
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Citation Formats
APA Style (7th ed.)
Avicenna. (2026, March 7). Therefore, in medicine we ought to know the causes of sickness and health. FixQuotes. https://fixquotes.com/quotes/therefore-in-medicine-we-ought-to-know-the-causes-162056/
Chicago Style
Avicenna. "Therefore, in medicine we ought to know the causes of sickness and health." FixQuotes. March 7, 2026. https://fixquotes.com/quotes/therefore-in-medicine-we-ought-to-know-the-causes-162056/.
MLA Style (9th ed.)
"Therefore, in medicine we ought to know the causes of sickness and health." FixQuotes, 7 Mar. 2026, https://fixquotes.com/quotes/therefore-in-medicine-we-ought-to-know-the-causes-162056/. Accessed 26 Mar. 2026.












