Ibn Sina (Avicenna)

ابن سينا

Abu Ali

Abu Ali al-Husayn ibn Abd Allah ibn Sina, known in Latin as Avicenna, was a philosopher, physician and polymath of the eastern Islamic world. The traditional chronology places his birth around 370 AH / 980–981 CE in Afshana near Bukhara, although modern scholarship has questioned the precision of that date and argued for an earlier birth. Educated in Bukhara, he entered Samanid service while still young, later moved through Khwarazm, Jurjan, Rayy and Hamadan, served as physician and vizier, endured political dismissal and imprisonment, and spent his final productive years in Isfahan under Ala al-Dawla. His major works include the philosophical encyclopedia Kitab al-Shifa, al-Isharat wa-l-Tanbihat and the medical al-Qanun fi al-Tibb. His metaphysics of the Necessary Existent, psychology of the rational soul and synthesis of logic and natural philosophy shaped Islamic, Jewish and Latin thought for centuries. He died in Hamadan in 428 AH / 1037 CE.

? — 1037

Names and variants

Ibn Sina (Avicenna)· canonicalIbn Sina (Avicenne)· canonicalابن سينا· canonicalal-Husayn ibn Abd Allah ibn Sina· birth nameالحسين بن عبد الله بن سينا· birth nameAbu Ali· kunyaأبو علي· kunyaal-Shaykh al-Raʾis· laqabالشيخ الرئيس· laqabAvicenna· variantAvicenne· variantAbu Ali Ibn Sina· variantİbn Sînâ· transliterationابوعلی سینا· variant

Ibn Sina

Abu Ali al-Husayn ibn Abd Allah ibn Sina, known in Latin as Avicenna, was a philosopher, physician and polymath whose synthesis of logic, natural philosophy, metaphysics, psychology and medicine became one of the most influential intellectual systems of the medieval Islamic world.

Sources: [1] Biographical, philosophical, medical or reception context, [2] Biographical, philosophical, medical or reception context, [3] Biographical, philosophical, medical or reception context, [4] Biographical, philosophical, medical or reception context, [5] Biographical, philosophical, medical or reception context, [6] Biographical, philosophical, medical or reception context, [7] Biographical, philosophical, medical or reception context, [8] Biographical, philosophical, medical or reception context, [9] Biographical, philosophical, medical or reception context, [10] Biographical, philosophical, medical or reception context, [11] Biographical, philosophical, medical or reception context, [12] Biographical, philosophical, medical or reception context, [13] Biographical, philosophical, medical or reception context, [14] Biographical, philosophical, medical or reception context

Full name

His full name is commonly given as Abu Ali al-Husayn ibn Abd Allah ibn al-Hasan ibn Ali ibn Sina.

Kunya: Abu Ali

His established kunya was Abu Ali.

Al-Shaykh al-Raʾis

Later Muslim scholarship widely called him al-Shaykh al-Raʾis, “the preeminent master,” in recognition of his philosophical and scientific authority.

Avicenna

The Latin form Avicenna developed from medieval renderings of Ibn Sina’s name and became standard in European intellectual history.

Traditional birth chronology

The dominant traditional chronology places Ibn Sina’s birth around 370 AH / 980–981 CE in Afshana near Bukhara.

The birth year is not fully secure

Modern scholarship has questioned the precision of 370 AH / 980 and has argued that inconsistencies in the autobiographical chronology may point to an earlier birth. The exact year should therefore not be treated as certain.

Afshana near Bukhara

He was born in Afshana, a village near Bukhara in the Samanid realm, and the family moved to Bukhara while he was still young.

His father Abd Allah

His father Abd Allah came from Balkh and served in the Samanid administration, apparently as an official associated with the district of Kharmaythan.

An Ismaʿili intellectual environment at home

Ibn Sina’s autobiography describes his father as interested in Ismaʿili teachings and recounts discussions at home about philosophy, geometry and Indian mathematics. Ibn Sina does not present himself as simply adopting his father’s Ismaʿili commitments.

Early Qurʾanic and literary education

He received an early education in the Qurʾan, language, literature, creed and jurisprudence before turning intensively to the philosophical sciences.

Early Hanafi legal study

His autobiographical account names the Hanafi jurist Ismail al-Zahid among his early teachers in religious learning.

Al-Natili

The philosopher Abu Abd Allah al-Natili taught him introductory logic and parts of Euclid and Ptolemy before Ibn Sina increasingly pursued the advanced curriculum through self-study.

An unusually strong culture of self-study

The autobiography emphasizes that Ibn Sina repeatedly moved beyond the level of his teachers by reading texts and commentaries on his own. This self-presentation is central to the source but also belongs to a crafted autobiographical narrative.

Aristotle’s Metaphysics and al-Farabi

Ibn Sina famously reports reading Aristotle’s Metaphysics many times without grasping its purpose until a short work by al-Farabi clarified the subject for him.

Medical formation

After extensive philosophical study, he turned seriously to medicine, combining reading with practical experience and contact with physicians such as Abu Mansur al-Qumri and Abu Sahl al-Masihi in the wider biographical tradition.

Early medical reputation

His autobiography claims that by around sixteen he had become sufficiently skilled in medicine for established physicians to consult him. This is important autobiographical testimony but should not be turned into a precisely verifiable modern credential.

Treatment of Nuh ibn Mansur

As a young physician he was summoned to help treat the Samanid ruler Nuh ibn Mansur; his success gave him privileged access to the Samanid palace library.

The Samanid palace library

Ibn Sina later described the palace library as containing rare works he had never encountered elsewhere, and access to it was important for his early intellectual development.

The autobiography and al-Juzjani’s continuation

Much of Ibn Sina’s life is known from an autobiographical account written or dictated to his student Abu Ubayd al-Juzjani, who then continued the biography after the point where Ibn Sina’s own account ends.

The autobiography is invaluable but literary

The autobiography is the most extensive source for Ibn Sina’s life, yet its chronology and stylized presentation of his education require critical reading rather than literal acceptance of every age and sequence.

Departure from Bukhara

After the collapse of Samanid power, Ibn Sina left Bukhara and began a long career moving among courts and cities across Khwarazm and western Iran.

Gurganj in Khwarazm

At Gurganj he entered the scholarly environment of the Maʾmunid court, where several major scientists and physicians were active.

Exchange with al-Biruni

Ibn Sina and al-Biruni engaged in written exchanges and debates on questions in natural philosophy and astronomy. Their interaction was intellectual disagreement, not a teacher-student relationship.

The Mahmud of Ghazna pursuit story

Later sources tell a dramatic story in which Mahmud of Ghazna demanded the scholars of Gurganj and had portraits circulated to find Ibn Sina after he refused. This colorful episode comes from later biographical tradition and should not be treated as secure in every detail.

Journey to Jurjan

After leaving Khwarazm, Ibn Sina travelled through several towns of Khurasan before reaching Jurjan, where he found a more stable intellectual environment.

Meeting Abu Ubayd al-Juzjani

Around 403 AH / 1012–1013 CE he met Abu Ubayd al-Juzjani at Jurjan. Al-Juzjani became his student, companion, amanuensis and later biographer.

Beginning the Canon

TDV places the beginning of al-Qanun fi al-Tibb at Jurjan; the medical encyclopedia was then completed over a longer period of Ibn Sina’s career.

Rayy and Majd al-Dawla

At Rayy Ibn Sina entered Buyid service and treated the ruler Majd al-Dawla, beginning a new phase of courtly medical and political activity.

Physician to Shams al-Dawla

In Hamadan he successfully treated the Buyid ruler Shams al-Dawla for colic and gained his confidence.

Vizier in Hamadan

Shams al-Dawla appointed Ibn Sina vizier, making political administration a major part of his life alongside medicine and philosophy.

Military revolt and dismissal

A military revolt against Ibn Sina led to the seizure of his property, temporary removal from office and a period in hiding; Shams al-Dawla later recalled and reinstated him.

Teaching at night while serving as vizier

Al-Juzjani reports that Ibn Sina continued teaching and writing at night after days occupied by court and administrative duties.

Imprisonment at Fardajan

In 414 AH / 1023 CE Ibn Sina was imprisoned in Fardajan fortress after political accusations connected with his correspondence with Ala al-Dawla of Isfahan.

Writing in prison

During the Fardajan imprisonment he wrote works including al-Hidaya, Hayy ibn Yaqzan and a treatise on colic.

Move to Isfahan

Around 415 AH / 1024 CE Ibn Sina secretly left Hamadan for Isfahan with al-Juzjani and entered the service of the Kakuyid ruler Ala al-Dawla.

The Isfahan years

His years in Isfahan were comparatively stable and productive. He participated in learned gatherings, continued writing and accompanied Ala al-Dawla on campaigns and journeys.

Astronomical observations

At Ala al-Dawla’s request Ibn Sina undertook astronomical observations aimed partly at correcting calendrical problems, although the project did not reach a complete result.

The loss of his library

During the Ghaznavid capture of Isfahan, Ibn Sina’s house and library were looted, contributing to the loss of some writings and notes.

Kitab al-Shifa

Kitab al-Shifa, “The Book of Healing,” is not a medical book but a vast philosophical and scientific encyclopedia covering logic, natural philosophy, mathematics and metaphysics.

The Healing is not the Canon

Because of its title, al-Shifa is sometimes mistakenly confused with medical healing. Ibn Sina’s principal medical encyclopedia is al-Qanun fi al-Tibb; al-Shifa concerns the philosophical sciences.

Al-Najat

Al-Najat presents a more compact philosophical synthesis drawing on material from Ibn Sina’s larger works.

Al-Isharat wa-l-Tanbihat

Al-Isharat wa-l-Tanbihat is one of Ibn Sina’s mature and highly compressed philosophical works, treating logic, physics, metaphysics and questions of the rational soul.

Danishnama-yi Alaʾi

The Danishnama-yi Alaʾi, written in Persian for Ala al-Dawla, helped establish a technical Persian vocabulary for philosophy and science.

Al-Qanun fi al-Tibb

Al-Qanun fi al-Tibb systematized Greek, Hellenistic, Syriac and Islamic medical learning together with Ibn Sina’s own clinical experience into a comprehensive medical encyclopedia.

Five books of the Canon

The Canon is organized into five books: general principles, simple drugs, diseases of particular organs, diseases not restricted to one organ, and compound remedies.

A Galenic system transformed

The Canon is fundamentally rooted in Galenic medicine, but Ibn Sina reorganized, systematized and modified that inheritance rather than merely copying Galen.

Premodern medicine, not modern clinical guidance

The Canon is a landmark of medieval medicine and medical education, but its historical authority should not be confused with modern evidence-based medical guidance.

Observation and method in medicine

Ibn Sina combined inherited theory with diagnosis, clinical observation and discussion of how drug effects should be tested, although these practices belong to a premodern scientific framework.

The Necessary Existent

At the center of Ibn Sina’s metaphysics is the distinction between what is necessary in itself and what is merely possible in itself but receives existence through a cause. The chain of dependence culminates in the Necessary Existent.

Essence and existence

Ibn Sina’s analysis of essence and existence became foundational for later Islamic and Latin metaphysics, although later thinkers developed the distinction in different ways.

Emanation and cosmology

His cosmology explains the ordered multiplicity of the universe through a structured emanative scheme beginning from the Necessary Existent and involving separate intellects and celestial spheres.

Creation and eternity require careful wording

Ibn Sina’s account of the world’s dependence on God combines necessary causal dependence with an eternal cosmological order. It cannot be reduced either to simple atheism or to the later kalam model of temporal creation.

Prophecy in the philosophical system

Ibn Sina incorporated prophecy into his philosophical account of human cognition, imagination, intellect and political-religious order rather than treating revelation as irrelevant to philosophy.

The Flying or Floating Man

The famous “floating man” thought experiment asks us to imagine a person deprived of sensory contact who nevertheless remains aware of his own existence; Ibn Sina uses it to argue for the soul’s self-awareness and distinction from bodily perception.

The rational soul

Ibn Sina argues that the human rational soul comes into existence with the body yet is an immaterial substance capable of surviving bodily death.

The internal senses

His psychology gives detailed roles to internal faculties such as common sense, imagery, imagination, estimation and memory, helping explain how sensory information contributes to cognition.

The active intellect

Human intellectual knowledge in Ibn Sina’s system involves the active intellect, which supplies intelligible forms when the rational soul is properly prepared to receive them.

Intuition and the middle term

Ibn Sina’s epistemology places great importance on the ability to grasp the middle term of a demonstration, whether through disciplined reasoning or unusually powerful intuition.

Logic as method

Logic is the central method of Ibn Sina’s philosophical system, governing the formation of concepts, definitions and demonstrative judgments.

Reason and experience

Recent scholarship emphasizes that Ibn Sina’s rationalism also contains a strong empirical dimension: sense experience supplies material for cognition even though universal and demonstrative knowledge requires intellectual processing.

The label “mystical philosophy” is debated

Some later readers interpreted parts of Ibn Sina’s writings through mystical categories, especially the final sections of al-Isharat. Modern specialists disagree over whether this represents a distinct mystical philosophy or philosophical psychology using spiritual language.

Hayy ibn Yaqzan

In Hayy ibn Yaqzan Ibn Sina uses allegorical narrative to express themes concerning the rational soul, knowledge and intellectual ascent.

Debate with al-Biruni

The surviving Ibn Sina–al-Biruni exchanges show sharp disagreement on natural-philosophical and cosmological questions and are valuable evidence of active scientific debate around the turn of the eleventh century.

Students and transmitters

Students such as al-Juzjani and Bahmanyar helped transmit Ibn Sina’s works and system, while later generations transformed Avicennian philosophy in new theological and philosophical contexts.

Al-Ghazali’s critique

Al-Ghazali later made Avicennian philosophy a major target of Tahafut al-Falasifa, while simultaneously adopting important logical and conceptual tools associated with the philosophical tradition.

The post-Avicennian tradition

For centuries, Islamic philosophy and much of later kalam developed through engagement with Ibn Sina: accepting, revising, integrating or rejecting parts of his system.

Latin Avicenna

Latin translations beginning in the twelfth century made Ibn Sina a major authority in medieval European metaphysics, psychology and natural philosophy.

The Canon in medical education

The Latin Canon became a major medical teaching text in European universities from the later Middle Ages into the early modern period.

Historical science, not modern science

Ibn Sina’s medicine and natural philosophy were extraordinarily sophisticated within their historical settings, but individual claims should not be presented as validated modern scientific conclusions without independent contemporary evidence.

Death in 428 AH / 1037 CE

After recurrent illness while accompanying Ala al-Dawla, Ibn Sina died at Hamadan in 428 AH / 1037 CE.

Reports of colic and self-treatment

The biographical tradition connects his final illness with recurrent colic and his own attempts at treatment. These medical details derive largely from al-Juzjani’s narrative and should not be transformed into a modern retrospective diagnosis.

Burial in Hamadan

Ibn Sina was buried in Hamadan, where his tomb became a major site of later commemoration.

A system larger than medicine

Although modern popular memory often emphasizes Avicenna the physician, his philosophical system was at least as important historically and shaped logic, metaphysics, psychology, theology and scientific classification for centuries.

Physician, philosopher and architect of a system

Ibn Sina’s enduring importance lies in the scale of his synthesis: he transformed inherited Greek and Arabic sciences into an Avicennian system that became a central reference point for later Islamic, Jewish and Christian intellectual traditions.

Source-sensitive points

probable

The traditional chronology places Ibn Sina’s birth around 370 AH / 980–981 CE, but the exact year is not fully secure.

uncertain

Modern scholarship has argued that inconsistencies in the autobiographical chronology may indicate a birth earlier than 980.

reported

Ibn Sina’s autobiographical account portrays his father as connected with Ismaʿili teaching circles, without presenting Ibn Sina himself as simply adopting that affiliation.

reported

Ibn Sina reports that treating the Samanid ruler Nuh ibn Mansur gained him access to the palace library.

established

Ibn Sina’s autobiography is a fundamental source for his life but contains chronological and literary features that require critical reading.

established

Ibn Sina and al-Biruni engaged in documented written debates on natural philosophy and astronomy.

reported

The story that Mahmud of Ghazna circulated portraits in order to find Ibn Sina belongs to later biographical tradition and should remain reported rather than established.

established

Ibn Sina was imprisoned at Fardajan fortress in 414 AH / 1023 CE amid political conflict in Hamadan.

established

Kitab al-Shifa is a philosophical-scientific encyclopedia, not Ibn Sina’s principal medical work.

established

Al-Qanun fi al-Tibb is organized into five books and became Ibn Sina’s principal systematic medical encyclopedia.

established

The Canon is a landmark of medieval medicine but should not be treated as modern evidence-based clinical guidance.

established

Ibn Sina’s metaphysics culminates in the Necessary Existent as the ultimate ground of the existence of contingent beings.

established

Ibn Sina’s analysis of essence and existence became foundational for later Islamic and Latin metaphysics.

established

The floating-man thought experiment is used by Ibn Sina to argue for the soul’s immediate self-awareness independently of bodily sensation.

established

Ibn Sina argues that the rational soul is an immaterial substance capable of surviving bodily death.

established

Ibn Sina integrates prophecy and revelation into his philosophical account of cognition, imagination and political-religious order.

disputed

Modern specialists disagree over whether parts of Ibn Sina’s later writings constitute a distinct mystical philosophy or philosophical psychology expressed in spiritual language.

established

Ibn Sina died in Hamadan in 428 AH / 1037 CE.

reported

The account that recurrent colic and self-treatment shaped Ibn Sina’s final illness comes largely from al-Juzjani’s biographical narrative and should remain reported.

established

Later Islamic philosophy and much of post-classical kalam developed in sustained engagement with Ibn Sina’s system, whether through adoption, revision or critique.

Relationships

Al-Biruni

other · established

Contributions

A comprehensive philosophical system

Through al-Shifa, al-Najat and al-Isharat, Ibn Sina built a highly integrated system of logic, natural philosophy, psychology and metaphysics that became a central reference point for later Islamic thought.

scholarly · established

A foundational metaphysics of necessity and contingency

His analysis of the Necessary Existent, contingency, essence and existence reshaped metaphysical vocabulary and argument across Islamic, Jewish and Latin traditions.

scholarly · established

A major medical synthesis in the Canon

Al-Qanun fi al-Tibb reorganized inherited medicine into a five-book encyclopedic system that became extraordinarily influential in Islamic and European medical education.

scholarly · established

Philosophical integration of prophecy and religious life

Ibn Sina incorporated prophecy, revelation, imagination and the ordering role of religion into a systematic philosophical account rather than treating religion as external to philosophy.

religious · established

A transregional Avicennian afterlife

His works generated centuries of reception, criticism and transformation in Islamic philosophy and kalam and in medieval Jewish and Latin thought.

other · established

Sources

[1]
ʿUyūn al-anbāʾ fī ṭabaqāt al-aṭibbāʾ
Ibn Abi Usaybia · Classical biographical source
[2]
The Life of Ibn Sina
William E. Gohlman · SUNY Press · 1974
[3]
Kitāb al-Shifāʾ
Ibn Sina · Primary philosophical encyclopedia
[4]
İBN SÎNÂ
Ömer Mahir Alper et al. · TDV İslâm Ansiklopedisi · 1999
[5]
al-Asʾila wa-l-ajwiba bayna Ibn Sīnā wa-l-Bīrūnī
Ibn Sina; al-Biruni · Primary correspondence
[6]
Avicenna
Lenn E. Goodman · Routledge · 1992
[7]
Avicenna
Jon McGinnis · Oxford University Press · 2010
[8]
AVICENNA ii. Biography
Dimitri Gutas · Encyclopaedia Iranica · 1987
[9]
al-Najāt
Ibn Sina · Primary philosophical work
[10]
al-Ishārāt wa-l-tanbīhāt
Ibn Sina · Primary philosophical work
[11]
al-Qānūn fī al-ṭibb
Ibn Sina · Primary medical work
[12]
Avicenna and the Aristotelian Tradition
Dimitri Gutas · Brill · 2014
[13]
Ibn Sina [Avicenna]
Dimitri Gutas et al. · Stanford Encyclopedia of Philosophy · 2025
[14]
Dānishnāma-yi ʿAlāʾī
Ibn Sina · Primary Persian philosophical work

Back