Al-Ghazali

Abu Hamid Muhammad ibn Muhammad al-Ghazali was born in 1058 in Tus, a town in the Khorasan region of northeastern Persia, then under the rule of the Seljuk Empire ^[1]. His father, a man of modest means often described in the sources as a wool spinner or wool merchant, died while Abu Hamid and his younger brother Ahmad were still boys. Before his death he entrusted the two children to a Sufi friend along with a small inheritance to pay for their schooling ^[2].

When that money ran out, the brothers entered a madrasa, where students received board as well as instruction. Al-Ghazali later remarked, with characteristic candor, that he had first sought knowledge for reasons other than God and that learning had refused to be anything but for God. He studied jurisprudence in Tus and then in Jurjan before returning home, and a frequently repeated anecdote from his student years tells how, after robbers seized his notebooks, he resolved to memorize everything he learned so that no thief could ever take his knowledge again ^[2].

Around 1077 he traveled to Nishapur, one of the great intellectual centers of Khorasan, to study under al-Juwayni, known as Imam al-Haramayn, the leading Ashari theologian of the age ^[1]. Under al-Juwayni he mastered Shafii law, Ashari kalam (rational theology), logic, and the methods of disputation. He remained in Nishapur until his teacher's death in 1085, by which time he had already begun writing and had built a reputation as a formidably quick mind ^[3].

After al-Juwayni died, al-Ghazali attached himself to the court camp of Nizam al-Mulk, the powerful Persian vizier of the Seljuk sultans and the founder of a network of state-sponsored colleges known as the Nizamiyya madrasas ^[1]. The vizier's circle functioned as a proving ground for scholars, and al-Ghazali distinguished himself in debates against senior jurists and theologians.

In 1091 Nizam al-Mulk appointed him professor at the Nizamiyya of Baghdad, the most prestigious teaching post in the Sunni world ^[3]. Al-Ghazali was then in his early thirties. Contemporary accounts describe lecture audiences numbering in the hundreds, including established jurists who came to hear him. Alongside his teaching he served the Abbasid caliphal court as a consultant on legal and doctrinal questions, and he wrote a refutation of the Ismaili (Batini) movement at the request of the caliph al-Mustazhir ^[2].

During these Baghdad years he undertook a systematic study of the Arabic Aristotelian philosophers, above all al-Farabi and Ibn Sina (Avicenna). He first summarized their doctrines fairly in Maqasid al-Falasifa (The Aims of the Philosophers), then attacked them in Tahafut al-Falasifa (The Incoherence of the Philosophers), completed in 1095 ^[4]. In the Tahafut he examined twenty philosophical theses and judged three of them, the eternity of the world, God's knowledge of universals only, and the denial of bodily resurrection, to amount to unbelief. The book became the most famous critique of Greek-inspired philosophy ever written in Islam and later provoked Ibn Rushd's celebrated reply, the Incoherence of the Incoherence ^[4].

In July 1095, at the height of his fame, al-Ghazali suffered a breakdown that he described in remarkable detail in his autobiography, al-Munqidh min al-Dalal (The Deliverer from Error). His tongue dried up so that he could not lecture, he lost his appetite, and physicians told him the ailment lay in his heart rather than his body ^[5]. He had come to fear that his teaching career was driven by ambition and love of prestige rather than sincere devotion, and he doubted whether any of the intellectual disciplines he had mastered could deliver certain knowledge.

That November he left Baghdad, announcing a pilgrimage to Mecca while privately intending a longer withdrawal. He arranged support for his family, gave away much of his wealth, and spent roughly two years in Damascus and Jerusalem living as an ascetic, performing spiritual exercises in the minaret of the Umayyad Mosque and in the Dome of the Rock ^[5]. He performed the hajj in 1096, visiting Mecca and Medina, before family obligations drew him back toward Khorasan.

The autobiography frames this decade of retreat as an epistemological journey as much as a spiritual one. Al-Ghazali recounts how he tested the claims of the theologians, the philosophers, the Ismaili doctrine of the infallible teacher, and the Sufis, and concluded that only the Sufi path combined sound doctrine with direct experiential knowledge, or dhawq (tasting) ^[5]. Because al-Munqidh is one of the earliest sustained intellectual autobiographies in any tradition, historians of literature study it alongside Augustine's Confessions, and it is the main reason he is remembered as an autobiographer as well as a theologian ^[3].

The central achievement of the retirement years was the Ihya Ulum al-Din (The Revival of the Religious Sciences), a forty-book compendium covering worship, social conduct, the vices that destroy the soul, and the virtues that save it ^[2]. The Ihya sought to reconnect the outward rules of Islamic law with inward sincerity, arguing that ritual without presence of heart is hollow. It became, and remains, one of the most read and most copied works in Islamic history, and al-Ghazali himself produced a Persian summary, the Kimiya-yi Saadat (Alchemy of Happiness), for readers without Arabic ^[3].

Any fair list of Al-Ghazali achievements must also count his work in law and legal theory. His al-Mustasfa min Ilm al-Usul, finished near the end of his life, is a standard reference in Shafii jurisprudence and helped develop the doctrine of maslaha, the consideration of public welfare in legal reasoning ^[6]. In logic he wrote accessible manuals that helped naturalize Aristotelian syllogistics within the religious sciences, so that the very tools of the philosophers he criticized became routine equipment for later jurists and theologians ^[4].

Modern scholarship has revised the older claim that his Tahafut single-handedly killed philosophy in the Islamic world. Researchers such as Frank Griffel have shown that al-Ghazali absorbed a great deal from Avicenna even while refuting him, and that philosophical activity continued for centuries after 1111, often inside theology itself ^[4]. What al-Ghazali actually did was set the terms: he insisted that demonstrative reasoning be judged case by case against revelation, accepting mathematics and logic while rejecting metaphysical conclusions he found unproven. His occasionalist account of causality, in which fire does not burn cotton by its own nature but by God's habitual ordering, was later cited with interest by European philosophers discussing causation ^[1].

Around 1106, after roughly eleven years away from public life, al-Ghazali returned to teaching at the Nizamiyya college of Nishapur at the urging of Fakhr al-Mulk, a son of his old patron Nizam al-Mulk ^[3]. He justified the return by noting that scholars expected a renewer (mujaddid) of religion at the turn of each Islamic century, and the year 1106 corresponded to the beginning of the sixth century of the hijra. He wrote that he was returning to teach for God's sake where he had once taught for the sake of position ^[5].

The Nishapur period was brief. Political conditions in Khorasan were unstable, Fakhr al-Mulk was assassinated in 1106, and al-Ghazali faced accusations from rival scholars, including complaints about his use of philosophy and criticism of some passages in the Ihya. He defended himself in writing and eventually withdrew to his native Tus, where he established a lodge (khanqah) for Sufi disciples and a small school beside his home ^[2].

In his final years he completed al-Mustasfa on legal theory and wrote Minhaj al-Abidin, a manual of devotion. He died in Tus on December 19, 1111, corresponding to 14 Jumada al-Akhira 505 in the Islamic calendar ^[1]. His brother Ahmad al-Ghazali, himself a noted Sufi, reported that on the morning of his death Abu Hamid performed his ablutions, prayed, asked for his shroud, kissed it, and lay down facing Mecca.

Details of al-Ghazali's private life are thinner than the record of his ideas, a common pattern in medieval biography. The sources agree that he married and had children; several daughters are mentioned, and concern for his family is one of the reasons he gave for returning from his travels to Khorasan ^[3]. His brother Ahmad, who took over his teaching post in Baghdad for a time, was his closest intellectual companion in the family.

His working languages were Arabic, the scholarly lingua franca in which most of his roughly seventy authenticated works were written, and Persian, his mother tongue, in which he wrote the Kimiya-yi Saadat and a book of counsel for rulers, Nasihat al-Muluk ^[6]. Some later traditions credit him with poetry, and verses of uncertain attribution circulated under his name, which is why medieval biographers sometimes list him as a poet as well ^[2].

Those who met him in his later years describe a man transformed by his Sufi discipline: austere in dress, careful in speech, and impatient with the courtroom-style disputation he had excelled at in his youth. In the Ihya he warned students against exactly the vices, love of fame, rivalry, and showing off in debate, that he confessed had once driven his own career ^[5].

Few thinkers in Islamic history match al-Ghazali's afterlife. Later Sunni tradition gave him the title Hujjat al-Islam, the Proof of Islam, and many scholars counted him the renewer of the fifth Islamic century ^[1]. His synthesis made Sufism respectable within Sunni orthodoxy: after the Ihya, mainstream jurists could treat the mystical path not as a suspect fringe but as the inner dimension of the law itself. The historian of religion W. Montgomery Watt, who translated al-Ghazali's autobiography into English, judged him one of the greatest Muslims after the Prophet Muhammad (PBUH), a verdict often repeated in Western surveys ^[5].

His influence crossed confessional lines. The Tahafut shaped centuries of debate, drawing Ibn Rushd's rebuttal in Muslim Spain, while Latin translations of the Maqasid made "Algazel" a familiar name to European scholastics, who ironically read his neutral summary of the philosophers as if it were his own doctrine ^[4]. Maimonides and Thomas Aquinas both worked within debates that al-Ghazali had helped to define, and his discussion of causality anticipated arguments later associated with Nicolas Malebranche and David Hume ^[4].

Basic Al-Ghazali facts, his birth in Tus in 1058, the Baghdad professorship, the 1095 crisis, the Ihya, and his death on December 19, 1111, are secure, yet his interpretation remains contested. Modernist critics have blamed him for turning Muslim intellectual culture away from natural science, while recent academic work rejects that story as too simple and presents him instead as a philosopher-theologian who reworked Avicennan ideas for a religious framework ^[4]. The Ihya is still taught in seminaries from West Africa to Indonesia, his autobiography appears on university syllabuses in philosophy and religious studies, and any Al-Ghazali biography written today enters a conversation about faith and reason that he set in motion nine centuries ago ^[6].