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Now it is established in the sciences that no knowledge is acquired save through the study of its causes and beginnings, if it has had causes and beginnings; nor completed except by knowledge of its accidents and accompanying essentials.

— Avicenna On Medicine (1020)

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More quotes by Avicenna

The knowledge of anything, since all things have causes, is not acquired or complete unless it is known by its causes.

On Medicine (1020)

An ignorant doctor is the aide-de-camp of death.

Familiar Medical Quotations (1968)

God, the supreme being, is neither circumscribed by space, nor touched by time; he cannot be found in a particular direction, and his essence cannot change.

Medicine considers the human body as to the means by which it is cured and by which it is driven away from health.

I [prefer] a short life with width to a narrow one with length.

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Quote text and notes from Wikiquote: Avicenna (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.