“The physician's highest calling, his only calling, is to make sick people healthy, to heal, as it is termed.”
Samuel Hahnemann · Organon of Medicine
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A physician who treats himself has a fool for a patient.
About this quote
Meaning
This wry observation points to the difficulty of applying professional judgment to oneself. A physician who attempts to diagnose and treat their own ailments lacks the perspective and emotional distance that good medical reasoning requires. Personal investment, anxiety, or wishful thinking can cloud assessment, making it harder to see clearly what is actually wrong and what ought to be done about it.
Context
The saying reflects a principle that practitioners in many fields have recognized: objectivity becomes harder when you are also the subject. In medicine, the stakes of compromised judgment can be serious, which is why the idea that even skilled clinicians need outside assessment has long been part of professional culture. The remark is often attributed to Osler in the context of his broader teaching on medical humility and self-awareness, and it has circulated as a memorable summary of that lesson for generations of students.
About the author
William Osler was a Canadian physician who lived from 1849 to 1919 and left a lasting mark on the culture and education of medicine in North America. He taught at leading medical institutions and was known for his insistence that good medicine required not just technical knowledge but also wisdom, empathy, and an honest awareness of one's own limitations. His writings and lectures were widely read and quoted, and many of his observations on the character of medical practice have continued to circulate as touchstones within the profession.
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