Hakim Abu Ali Husayn ibn Abdallah Sina (Ibn Sina), known in the West as Ibn Sina, was one of Iran’s greatest intellectual figures and a true polymath—physician, philosopher, mathematician, jurist, astronomer, and poet. He was born in 370 AHS in the village of Khurmithan near Bukhara. Honored with titles such as Shaykh al-Ra’is (Leader of Scholars) and Hujjat al-Haqq (Proof of the Truth), he later became known in Europe as the “Genius of the East.”
Ibn Sina lived during a time when Iran lacked a unified central government. Political instability and the absence of national cohesion forced him to move frequently between cities and regions. Eventually, he settled in lands governed by the Buyid dynasty and spent his final years in Hamadan, where he died in 428 AHS.
Historical sources describe Ibn Sina as exceptionally intelligent and hardworking from early childhood. By the age of ten, he had mastered the Qur’an, literature, and the foundational sciences, often surpassing his teachers. He studied jurisprudence under Ismail the Ascetic and philosophy under Abu Abdallah Natili, later turning to geometry and mathematics. Finding these subjects too easy, he turned towards medicine, at that time a relatively underdeveloped science, in which he quickly excelled.
As his reputation grew, Sultan Mahmud of Ghaznavi sent envoys to find the famed scholar, only to discover that the “wise man” was still a child or young adolescent. In his teenage years Ibn Sina had mastered the major sciences of his time and began treating patients. He later focused deeply on philosophy, spending long nights studying and turning to prayer whenever he struggled with complex ideas, seeking understanding through both intellect and faith.
The Discovery of al-Farabi’s Book and Ibn Sina’s Later Life
While studying philosophy, Ibn Sina turned to Aristotle’s Metaphysics but found it extremely difficult to understand. Despite reading the book more than forty times and memorizing it, its meaning remained unclear. His breakthrough came when he found an old book in the Bukhara market—The Purposes of Aristotle’s Metaphysics by Abu Nasr al-Farabi, the renowned philosopher known as the “Second Teacher.” Reading this work finally clarified Aristotle’s ideas and deepened Ibn Sina’s philosophical understanding.
At seventeen, Ibn Sina gained widespread fame after curing Emir Nuh ibn Mansur of the Samanid dynasty. In gratitude, he was granted access to the royal library of Bukhara, where he studied numerous rare and valuable works, greatly expanding his knowledge.
Political decline following the emir’s death, along with the loss of his father and the growing threat of Sultan Mahmud of Ghaznavi, forced Ibn Sina to leave Samanid territory. Rejecting Mahmud’s court due to his religious intolerance and violence, Ibn Sina sought refuge in Khwarazm, and later moved between regions to avoid Ghaznavid control.
Eventually, he found protection under the Buyid rulers and later settled in Isfahan with Ala al-Dawla Kakuyid, whom he accompanied on military campaigns. During one journey, a recurring illness returned. Succumbing to the limits of medicine, Ibn Sina died in 428 AHS in Hamadan, where he was buried.
Today, his tomb remains a place of reverence. Though best known in Europe for medicine and in the Islamic world for philosophy, Ibn Sina’s legacy extends across many branches of knowledge.
Medicine
Ibn Sina skillfully used medicine not only to heal but also to gain entry into royal courts. At eighteen, he treated a Samanid emir and later cured Majd al-Dawla, a Buyid ruler suffering from melancholia. He also treated Shams al-Dawla, Majd al-Dawla’s brother, relieving his colic on two occasions.
One of his most remarkable treatments involved Majd al-Dawla, who believed he was a cow. Ibn Sina disguised himself as a butcher and pretended to prepare the emir for slaughter. Thinking he needed to eat more to “fatten up,” the ruler willingly took the medicines and foods Ibn Sina prescribed, ultimately recovering.
In another case, Ibn Sina diagnosed a Ziyarid prince who appeared weak and anxious. By examining the pulse, he realized that love was the cause. With the help of assistants familiar with every street of the city, he identified the girl connected to the prince’s condition and recommended their union as the cure—treating love as a psychological illness.
Ibn Sina classified diseases into four types: phlegmatic, sanguine, melancholic, and choleric. Although he performed surgery, he prioritized scientific diagnosis over surgical practice, believing the available tools were insufficient.
His most famous work in medicine, “The Law”, remained a cornerstone of medical knowledge for seven centuries, widely studied in Europe, where he is known as Ibn Sina. Though often called the “Arab philosopher” in Europe, this is misleading—he wrote in Arabic because it was the scientific lingua franca of the 10th century, not because of his ethnicity.
Philosophy
Beyond medicine, Ibn Sina was equally renowned for his philosophical knowledge. He founded and developed the Mashsha’ (Peripatetic) school of Islamic philosophy, grounded in Aristotle’s teachings and emphasizing reason and logic as the basis of understanding.
In contrast, the Illuminationist (Ishrāqī) school, inspired by Plato, prioritized intuition and mystical insight over pure reason. This school was later established by the Iranian philosopher Suhrawardi.
Because Ibn Sina’s philosophy relied on intellect, he and his followers were known as rationalists. This rationalist approach sometimes clashed with mystical thought; for instance, some Sufi figures, like Sheikh Abu al-Hasan Kharqani, described Ibn Sina as “blind of the heart”—meaning that, though lacking spiritual sight, he could perceive truths through reason alone.
Ibn Sina greatly influenced later thinkers, most notably Omar Khayyam of Nishapur, the renowned mathematician and philosopher, who regarded Ibn Sina as his teacher. Khayyam’s admiration was so profound that he is said to have died while reading Ibn Sina’s philosophical work, The Book of Healing (Al-Shifa).
Al-Shifa represents Ibn Sina’s philosophical method and rational approach. His emphasis on reason and inquiry is reminiscent of René Descartes’ 17th-century philosophy, encapsulated in “I think, therefore I am.” Like Descartes, Ibn Sina encouraged critical thinking, questioning, and the pursuit of knowledge through intellect.
Geometry, Mathematics, Astronomy, and Other Sciences
Ibn Sina made original contributions to geometry that were unprecedented in his time. He mastered arithmetic, algebra, astronomy (zijs and calendars), music, and other sciences inherited from previous scholars. However, he found these fields relatively simple and thus devoted most of his energy elsewhere. Like Aristotle, his teacher, Ibn Sina considered philosophy the highest form of knowledge and focused extensively on it. Medicine also captivated him, as it was still developing and full of unanswered questions.
Literature
Ibn Sina wrote poetry, much of which has been attributed to him by literary scholars. Many of his verses reflect deep philosophical meanings or were composed as responses to specific individuals. However, the attribution of many Persian and Arabic poems to him is uncertain, as some appear in the collections of other poets, or their style does not align with his philosophical thinking.
Ibn Sina’s Medical Works
- Al-Qanun (The law): His most famous medical work, a comprehensive treatise that organizes and systematizes medical knowledge.
- Risala al-Kasni (On Chicory): Discusses the medicinal properties of the chicory plant.
- Risala al-Sikanjabin (On Syrup and Vinegar): Explores the therapeutic effects of vinegar and sugar extracts.
- Risala fi Hifz al-Sihha (On Health Preservation): Covers principles for maintaining human health.
- Risala al-‘Ishq (On Love): Treats melancholic disorders, viewing love as a psychological condition.
- Qawanin wa Mu‘alajat Tabi‘iyya (Medical Laws and Treatments): Focuses on medical principles and treatments.
- Risala fi al-Qulanj (On Colic): Examines the causes and remedies for colic.
Philosophy
- Al-Shifa (The Book of Healing): Ibn Sina’s major philosophical work and cornerstone of the Mashsha’ (Peripatetic) school, based on logic and rational reasoning. It classifies knowledge into three main categories:
- Higher sciences – metaphysics and immaterial studies.
- Lower sciences – material sciences measurable through the senses.
- Intermediate sciences – mathematics.
- Al-Najat (Deliverance): A concise summary of Al-Shifa, presenting its core philosophical ideas.
- Al-Isharat (Remarks): Focuses on mysticism, ethics, and love; written later in Ibn Sina’s life and reflects a more innovative approach.
- Danishnama-ye ‘Alai (The ‘Alai Encyclopedia): Composed for Ala al-Dawla Kakuyah, the ruler of Isfahan, this work uses Persian terms for technical and philosophical concepts to make the material more understandable.
Jurisprudence (Fiqh)
- Risala fi al-Nubuwwa (On Prophethood): Discusses prophecy and the role of Prophet Muhammad (PBUH).
- Risala al-Idrak ba‘d al-Mawt (Awareness After Death): A philosophical and jurisprudential treatise on the soul’s consciousness after death.
In total, twenty-four other fiqh treatises by Ibn Sina have survived.
Literature
Ibn Sina also composed poetry, mainly in qasida and rubai forms. Eleven long Arabic qasidas are preserved, along with several Persian rubaiyat referenced in later poets’ works. Many of his writings on mathematics, geometry, and other sciences are recorded in historical bibliographies and were used by scholars, but much of this material has been lost over time due to political turmoil and invasions, such as the Mongol destruction of libraries.
Ibn Sina’s Contributions to the Development of Modern Medicine
Ibn Sina’s Al-Qanun fi al-Tibb (The Law of Medicine) was the premier medical reference of its era, taught throughout the Islamic world and in European universities for over seven centuries. The work addresses a wide array of topics, including diseases transmitted through water and soil, contagious illnesses like tuberculosis, and mental disorders such as melancholia.
He was the first to identify parasites in the human body and explain the illnesses they cause. His analysis of colic and its various forms showcased extraordinary medical insight. In “The Law” Ibn Sina attributed disease to tiny living organisms—nearly 900 years before Louis Pasteur discovered microbes. Lacking microscopes and modern laboratory equipment, his observations were nonetheless so respected that European scholars treated his text almost as a sacred authority, earning him the title “Genius of the East.”
Ibn Sina also made notable advances in anatomy, medicinal plants, tumors, cancerous glands, and cellular vibrations. He even experimented with using electric shocks to treat paralysis, a practice that anticipated similar developments in modern biology by nearly a thousand years.
Interactions with Scholars
The Khwarazm court was a center for scholarly exchange. After moving there, Ibn Sina met many local scientists as well as scholars fleeing Sultan Mahmud of Ghazni. Among them, the eminent Iranian polymath Abu Rayhan al-Biruni stood out. Ibn Sina and al-Biruni maintained a close scholarly relationship, but circumstances separated them: al-Biruni joined the Ghaznavid court, while Ibn Sina sought refuge with the Buyid rulers.
Students of Ibn Sina
Some of Ibn Sina’s most notable students include Abu al-Hasan Bahmanyar, Abu Ubayd Juzjani, Yusuf Ilaqi, and Abu Mansur Isfahani. Among them, Juzjani stood out for accompanying Ibn Sina for twenty years—from his migration to Khwarazm until his death—spending nearly all his time under his teacher’s guidance. Juzjani later preserved and transmitted Ibn Sina’s teachings to historians and scholars. Even a century later, the renowned philosopher and mathematician Omar Khayyam of Nishapur considered himself a student of Ibn Sina in philosophy, referring to him as his “master.”
Ibn Sina in Persian Literature
Poetic Literature: In Rumi’s Masnavi-ye Ma’navi, several passages describe Ibn Sina’s encounters with Sufi masters like Sheikh Abu al-Hasan Kharqani and Sheikh Abu Said Abu’l-Khayr.
Prose Literature: Ibn Sina is frequently mentioned in Sufi prose, especially in Tadhkirat al-Awliya by Sheikh Farid al-Din Attar of Nishapur, as well as in Asrar al-Tawhid by the grandson of Sheikh Abu Said Abu’l-Khayr. In Saadi’s Gulistan, he appears under the title “Sheikh al-Rais,” with various anecdotes illustrating his wisdom.
According to Tadhkirat al-Awliya, Ibn Sina once traveled to Kharqan (near Shahroud) to visit Sheikh Abu al-Hasan Kharqani. Finding the Sheikh absent and being insulted by his wife, Ibn Sina went into the desert and saw the Sheikh carrying firewood on a lion. The Sheikh remarked, “Until I bear the burden of my wife with my inner light, how can the lion carry my load?”
In Asrar al-Tawhid, it is noted that Ibn Sina attended Sheikh Abu Said’s preaching sessions and privately conversed with him for three days, afterward claiming that true knowledge is perceived through the “inner eye” or spiritual insight.
Global Legacy of Ibn Sina
UNESCO honors exceptional contributions to science and philosophy each year with the Ibn Sina Prize. Similarly, the German Cultural Foundation recognizes distinguished philosophers. A statue of Ibn Sina stands at the United Nations’ permanent office in Vienna, reflecting his enduring influence. His achievements have left a lasting legacy that continues to inspire scholars at universities worldwide.
Ibn Sina was known for wearing a long cloak and a turban-like hat, a style that later inspired the academic gown and cap worn by graduates. In his 58 years, he authored nearly 450 works, leaving an immense body of knowledge.
Had he lived closer to the modern era, human knowledge might have advanced even further. It is our responsibility to preserve the intellectual and cultural heritage of this great Iranian scholar, safeguarding it from foreign influence and taking pride in Iran’s unique contribution to global knowledge.
