Abū ʿAlī al-Ḥusayn ibn ʿAbd Allāh ibn Sīnā (Persian: ابو علی الحسین ابن عبدالله ابن سینا (c. 980 in Balkh, Khorasan – 1037 in Hamedan), also known as Ibn Seena and commonly known in English by his Latinized name Avicenna (Greek Aβιτζιανός), was a Persian Muslim polymath and the foremost physician and philosopher of his time. He was also an astronomer, chemist, Hafiz, logician, mathematician, poet, psychologist, physicist, scientist, Sheikh, soldier, statesman and theologian.
- The knowledge of anything, since all things have causes, is not acquired or complete unless it is known by its causes. Therefore in medicine we ought to know the causes of sickness and health. And because health and sickness and their causes are sometimes manifest, and sometimes hidden and not to be comprehended except by the study of symptoms, we must also study the symptoms of health and disease. 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. Of these causes there are four kinds: material, efficient, formal, and final.
- Those who deny the first principle should be flogged or burned until they admit that it is not the same thing to be burned and not burned, or whipped and not whipped.
- Metaphysics, Book I
- An ignorant doctor is the aide-de-camp of death.
- as quoted from "Familiar Medical Quotations" by Maurice B. Strauss - published in 1968.
- It is evident that everything which does not exist at first and then exists, is determined by something other than itself.
- Medicine considers the human body as to the means by which it is cured and by which it is driven away from health.
- The world is divided into men who have wit and no religion and men who have religion and no wit.
- Width of life is more important than length of life.
- There are no incurable diseases — only the lack of will. There are no worthless herbs — only the lack of knowledge.
- This quote has also been attributed to Chinese medicinal texts.
- Avicenna an article by Seyyed Hossein Nasr on Encyclopedia Britannica Online
- Avicenna An article by Encyclopedia Iranica
- Biography & Works from Routledge
- Ibn Sina (Islamic Philosophy Online)
- Ibn Sina from the Encyclopedia of Islam
- Avicenna/Ibn Sina at the Internet Encyclopedia of Philosophy
- Catholic Encyclopedia: Avicenna