Avicenna (DEPRECATED — superseded by canonical entry)

Introduction

Avicenna — the Latin name for Abū ʿAlī al-Ḥusayn ibn ʿAbdallāh ibn Sīnā — is the Persian polymath of the late tenth and early eleventh centuries whose systematic philosophical work synthesized Aristotle, Plotinus, and the Islamic theological tradition into the dominant philosophical framework of the medieval Islamic world. His massive Kitāb al-Shifā' (The Book of Healing) is one of the most comprehensive single philosophical works ever produced; his shorter Kitāb al-Najāt (The Book of Salvation) is the abridged version that circulated more widely; the late al-Ishārāt wa-l-tanbīhāt (Pointers and Reminders) is the more compressed and philosophically subtle expression of his mature thought.

Avicenna's influence reaches in two directions. Within the Islamic philosophical tradition, his system became the dominant framework that subsequent figures — most importantly al-Ghazālī in critique and the Illuminationist (ishrāqī) tradition through Suhrawardī in development — were compelled to engage. Within the Latin West, the partial translation of Avicennian texts in twelfth-century Toledo made him the dominant source through which Aristotelian metaphysics, philosophy of mind, and theology entered Latin scholasticism. Aquinas's metaphysics of essence and existence, his account of the soul, and his theology of God are Avicennian in their conceptual architecture, even where they diverge on specific theses.

The medical work was equally consequential. The al-Qānūn fī'l-ṭibb (The Canon of Medicine) was the dominant medical textbook in the Islamic world and, in Latin translation, in European universities for over five centuries; it was used as a teaching text at Bologna, Padua, and Paris through the seventeenth century.

Life

Avicenna was born in 980 CE near Bukhara, in the eastern part of what is now Uzbekistan and was then the cultural capital of the Persian-speaking Samanid dynasty. His father was an Isma'ili official; the family was educated and prosperous. The biographical material is unusually detailed because Avicenna himself dictated an autobiography to his student al-Jurjānī that covered his early life, and al-Jurjānī continued the account through Avicenna's later years.

By his own account, Avicenna had mastered the Quran and Arabic literature by age ten, the trivium and elementary mathematics by his early teens, Aristotelian logic by age sixteen, and medicine by age eighteen. The famous passage in the autobiography on his struggle to understand Aristotle's Metaphysics — he read it forty times without grasping it, then encountered al-Fārābī's commentary on the work and the difficulty resolved — is the canonical illustration of how the Arabic philosophical tradition by his time had produced the interpretive resources for engaging Greek thought systematically.

The political circumstances of Avicenna's life were unstable. The Samanid dynasty fell during his youth; he served as physician and political adviser to a sequence of regional rulers across what is now Iran and Uzbekistan, including the Buyids and the Kakuyids; the political instability required frequent moves and produced episodes of imprisonment. The major works were composed in conditions that often required Avicenna to dictate at speed, work without a library, or compose while traveling. The Kitāb al-Shifā' was composed in pieces over more than a decade.

Avicenna died in 1037 in Hamadan, in western Iran, of complications from a chronic illness. He had served Isfahan ruler 'Alā' al-Dawla in his final years and accompanied him on the military campaign that occasioned his death. The tomb in Hamadan, refurbished in the twentieth century, remains a major site of philosophical and cultural pilgrimage.

The problem he worked on

Avicenna's central project was the systematic articulation of philosophy as a comprehensive science, integrating Aristotelian logic, natural philosophy, psychology, metaphysics, and ethics with the Plotinian metaphysics that had become Aristotelianized in the late ancient and early Islamic transmission. The system was supposed to be philosophically rigorous (proceeding by demonstration from first principles) while also being compatible with the central commitments of Islamic monotheism (a single, transcendent, providential God).

The central technical contribution that organizes the whole is the distinction between essence (māhiyya) and existence (wujūd). In every created thing, the essence (what the thing is) is distinct from the existence (that it is); in God alone, essence and existence coincide. The distinction allows Avicenna to give a precise metaphysical articulation of the contingency of creatures and the necessity of God, to ground a sophisticated argument for God's existence, and to develop a comprehensive metaphysics of being.

Contributions

The essence-existence distinction

Avicenna's most influential single contribution. In any contingent being, the essence (what kind of thing it is) is distinct from its existence (the fact that it actually is). The essence of horse does not include existence; we can grasp what a horse is without thereby grasping that any particular horse exists. In God alone, essence and existence coincide — God's essence just is to exist; God is the Necessary Existent (wājib al-wujūd).

The distinction has been continuously consequential. It provides the metaphysical basis for the Avicennian argument for God's existence: any contingent being requires a cause for its existence (since its essence does not include existence); the chain of contingent causes must terminate in a Necessary Existent. It provides the framework for understanding creation: created beings are those in which essence is distinct from existence and whose existence is therefore radically dependent. It provides the basis for Aquinas's subsequent development of the doctrine of God as ipsum esse subsistens (subsistent being itself) and for the broader Thomist metaphysics.

The argument for God's existence

Avicenna's argument for God's existence — sometimes called the proof from contingency or the proof of the Sincere — has been continuously influential. The structure: every contingent existent has a cause for its existence (since its essence does not include existence); the chain of contingent causes must terminate in something whose existence is not contingent but necessary; this Necessary Existent is what we call God.

The argument is distinct in structure from the cosmological argument inherited from Aristotle and developed in Aquinas. The Aristotelian-Thomist argument moves through observed motion and change in the world; the Avicennian argument moves through the structural distinction of essence and existence and is in this respect more abstract and more metaphysically loaded. The two arguments have been continuously compared and the relation between them is one of the central questions in the history of medieval natural theology.

Philosophy of mind: the flying man

The famous flying man thought experiment in the Kitāb al-Shifā' asks the reader to imagine a person created floating in space, with no sensory input, no contact with their own body, no prior experience. Would such a person have any awareness of themselves? Avicenna's answer is yes: the awareness of one's own existence is structurally prior to and independent of any sensory data; the soul knows itself directly without requiring the mediation of the body.

The argument is one of the most-discussed passages in the history of the philosophy of mind. It anticipates (by six hundred years) Descartes's cogito; the structural similarity is striking and the historical question of whether Descartes had direct or indirect knowledge of the Avicennian argument has been debated. The argument also provides the basis for Avicenna's defense of the immateriality and immortality of the rational soul.

The cosmology of emanation

Avicenna's cosmology integrates Aristotelian astronomy with Plotinian emanation. From the Necessary Existent emanates a hierarchy of intellects, each of which is the cause of one of the celestial spheres. The Active Intellect (al-'aql al-fa"al), the tenth intellect in the hierarchy, is the source of the forms of material things and of the abstractive cognition of the human intellect. The system is recognizably Plotinian in structure (descending emanation from a unified source) but is integrated with Aristotelian causation and the astronomical cosmology of Ptolemy.

The doctrine of the Active Intellect as the source of intellectual abstraction was one of the most influential single Avicennian doctrines in the Latin reception. It provided the framework within which subsequent debates about the nature of human cognition — especially the debate about whether the intellect is a power of the individual soul or a separate intelligence in which individuals participate — were conducted.

The Canon of Medicine

The al-Qānūn fī'l-ṭibb (The Canon of Medicine) is a five-book systematic synthesis of Greek (Galenic) medicine, Indian medical traditions known in the Islamic world, and Avicenna's own clinical experience. The first book covers general principles; the second covers materia medica (simple drugs); the third covers diseases of specific organs; the fourth covers diseases affecting the whole body (fevers, traumas); the fifth covers compound drugs.

The Latin translation by Gerard of Cremona (later twelfth century) made the Canon available to European medical schools, where it became the dominant teaching text. It was a required text at Bologna and Padua into the seventeenth century; some 60 Latin editions were printed in the late fifteenth and early sixteenth centuries alone. The book's organizational structure (general principles, then specific diseases by location, then systemic conditions) shaped European medical pedagogy for centuries.

Key works

• Kitāb al-Shifā' (The Book of Healing, c. 1014–1020). The massive systematic encyclopedia covering logic, natural philosophy, mathematics, and metaphysics.
• Kitāb al-Najāt (The Book of Salvation). The shorter version of the same material.
• al-Ishārāt wa-l-tanbīhāt (Pointers and Reminders). The late mystical-philosophical compression.
• al-Qānūn fī'l-ṭibb (The Canon of Medicine). The dominant medical textbook.
• Mantīq al-Mashriqiyyīn (The Easterner's Logic). A more independent presentation, partly lost.

The standard Arabic editions of major works are still being produced through the Iranian and Western scholarly projects. Major recent English translations include Michael Marmura's The Metaphysics of The Healing (Brigham Young, 2005), the Marmura translation of the Salvation, and the various Inati translations of Pointers and Reminders.

Influences and influenced

Influenced by: Aristotle (the fundamental philosophical framework); al-Fārābī (whose commentary on the Metaphysics unlocked Aristotle for Avicenna and whose political philosophy shaped him); Plotinus (through the Theology of Aristotle, the Arabic paraphrase of selected Enneads misattributed to Aristotle); Galen (the medical framework); the Islamic theological tradition (kalām) on questions about God's nature, creation, and providence.

Influenced: Subsequent Islamic philosophy through al-Ghazālī (whose Tahāfut al-falāsifa / Incoherence of the Philosophers was a sustained critique of Avicennian positions), Suhrawardī's Illuminationist tradition, Mullā Ṣadrā in seventeenth-century Persia, and the broader Persian philosophical tradition; the Andalusian tradition through Averroes; the Jewish tradition through Maimonides (whose Guide for the Perplexed engages Avicenna); the Latin scholastic tradition through the Toledo translations and through Aquinas's engagement; the broader history of the philosophy of mind through the flying man and its descendants; the history of medicine through five centuries of European pedagogy.

Reception

Avicenna's reception in the Islamic world was and continuous. al-Ghazālī's critique in the Tahāfut (c. 1095) attacked twenty Avicennian theses (some specific to Avicenna, others common to the falāsifa more generally) and shaped subsequent Islamic theological engagement with philosophy. The Persian philosophical tradition after Avicenna was largely the development, defense, or modification of his framework; Mullā Ṣadrā's seventeenth-century synthesis (ḥikma muta'āliya or Transcendent Wisdom) is in dialogue with the Avicennian system.

The Latin reception began with the Toledo translation project of the later twelfth century, especially through Dominicus Gundisalvi and his Mozarabic and Jewish collaborators. By the early thirteenth century, Avicenna was being engaged by the major Paris and Oxford masters; Albertus Magnus and Aquinas treated him as the principal Arabic philosophical authority alongside Averroes; the Avicennian metaphysics of essence and existence became foundational for the Thomist tradition.

The modern scholarly reception, especially since the twentieth-century work of Amelie-Marie Goichon, Louis Gardet, Henry Corbin, Dimitri Gutas, and Robert Wisnovsky, has recovered Avicenna as a philosopher in his own right rather than as a transmission figure. The Avicenna Study Group and the Oriens journal anchor contemporary scholarly engagement.

Continuing engagement

Major recent scholarly work includes Dimitri Gutas's Avicenna and the Aristotelian Tradition (1988; second edition 2014), Robert Wisnovsky's Avicenna's Metaphysics in Context (2003), Peter Adamson's Great Medieval Thinkers: Avicenna (2013), the work of Jon McGinnis (especially Avicenna, 2010), Michael Marmura's corpus of translations and studies, and the contributors to the Cambridge Companion to Arabic Philosophy (2005). Active scholarly debates concern the precise interpretation of the essence-existence distinction, the relation between Avicennian philosophy and Islamic theological orthodoxy, the question of Avicenna's potential mystical or Easterner turn in the late period, and the precise channels through which Avicennian doctrines reached the Latin scholastics.

Further reading

• Islamic Philosophy — the tradition Avicenna defined
• Aristotle — the fundamental philosophical framework
• Plotinus — the Neoplatonist source whose emanation framework Avicenna integrated
• Averroes — the Andalusian successor whose engagement with Avicenna shaped the Latin reception
• Aquinas — the Latin scholastic successor most shaped by Avicennian metaphysics
• Essence and Existence — his most influential single conceptual distinction

The Persian polymath whose systematic philosophy became the dominant framework of the medieval Islamic philosophical tradition and one of the foundational sources of Latin scholasticism.