What is Al-Ghazālī?
Al-Ghazālī (1058–1111) was a Persian theologian, jurist, philosopher, and Sufi who held the most prestigious teaching chair in the Islamic world before abandoning it in a spiritual crisis. After eleven years of itinerant Sufi practice, he wrote Iḥyāʾ ʿulūm al-dīn (The Revival of the Religious Sciences), integrating inner discipline into Sunni orthodoxy and shaping Islamic religious life for nine centuries.
The teaching chair and the crisis
Abū Ḥāmid Muḥammad al-Ghazālī was born in 1058 in Ṭūs, in the northeastern Persian region of Khurāsān. His father was a wool-spinner who attended the local shaykhs' lectures and, in his dying request, asked that his sons receive a religious education. Al-Ghazālī's intellect carried him through the leading madrasas of the region to the patronage of the Saljuq vizier Niẓām al-Mulk. At thirty-three he was appointed to the chair of jurisprudence at the Niẓāmiyya madrasa in Baghdad, the most prestigious teaching post in the Islamic world. He taught there for four years, writing on Aristotelian logic and the refutation of philosophy. His Tahāfut al-Falāsifa (The Incoherence of the Philosophers) dismantled the metaphysics of Ibn Sīnā and al-Fārābī in their own terms. By every external measure, he was the leading religious intellect of his generation.
In July 1095, his speech failed. In al-Munqidh min al-Ḍalāl (The Deliverance from Error), he wrote a detailed account of what followed: a six-month physical breakdown he diagnosed as a gap between his outer teaching and his inner state. He arranged for his dependants, divided his books, left Baghdad on a pretext of pilgrimage, and disappeared from institutional life for eleven years. This is usually called his Sufi turn, though that framing is misleading. He did not convert from one position to another. He concluded that the inner discipline practised by the Sufi lineages for centuries was the operative content of the religion the jurists and philosophers had been debating from the outside.
The Iḥyāʾ
He returned to teaching in 1106, first in Nīshāpūr and then back in Ṭūs. Across the years of withdrawal and those that followed, he produced what is generally considered the most consequential work of Islamic devotional literature: Iḥyāʾ ʿulūm al-dīn (The Revival of the Religious Sciences). The forty books cover every aspect of Islamic religious life: ritual purification, prayer, fasting, almsgiving, marriage, the disciplines of the inner faculties, the stations of love and trust and patience. For each practice, the text asks what the outer form is for, what inner state it is meant to cultivate, and what goes wrong when that inner content is missing. The Iḥyāʾ is where the sharīʿa (the outer law) and the ṭarīqa (the inner path) are presented as one organism rather than rival programmes.
The effect on Islamic religious history was immediate and lasting. After the Iḥyāʾ, it became difficult to argue that Sufi practice was marginal or heterodox. Sufi orders flourished across the next several centuries. The fuqahāʾ (jurists) who had been suspicious of Sufi vocabulary now had a treatise by their most prestigious colleague describing inner practice as the heart of the religion they were administering. The settlement held, with periodic disruptions, until the eighteenth-century reformist movements reopened the question.
Al-Ghazālī, Ibn Sīnā, and Ibn ʿArabī
Al-Ghazālī is sometimes grouped with the Islamic philosophers he actually opposed. His Tahāfut al-Falāsifa directly attacked the metaphysics of Ibn Sīnā and al-Fārābī. He used their logical methods but rejected their conclusions on the eternity of the world and the nature of the soul. Ibn ʿArabī, writing a century later, read al-Ghazālī closely but went further, developing a metaphysics of divine self-disclosure that al-Ghazālī himself would likely have found speculative. Where al-Ghazālī worked to keep Sufism within Sunni legal orthodoxy, Ibn ʿArabī moved toward a more universal framework. Al-Ḥallāj, executed in 922 for the ecstatic utterance anā al-ḥaqq (I am the Real), represents the path al-Ghazālī did not take: public proclamation of mystical union. Al-Ghazālī kept the inner work inward.
The integrator, not the originator
Al-Ghazālī did not invent any of the practices he wrote about. *Dhikr*, the remembrance of God by repeated invocation, was already centuries old. The stations of love, fear, hope, gratitude, and trust had been mapped by earlier Sufi masters such as al-Muḥāsibī and al-Qushayrī. What al-Ghazālī did was secure a settlement between those inner practices and the orthodox legal and theological frame. Other Sufi voices had failed to achieve this. Al-Ḥallāj, executed in 922, represents that failure most sharply. Al-Ghazālī succeeded because he worked within the law rather than beyond it. He is the integrator rather than the originator, and the institutional shape that mysticism takes in Islam today is largely his work.
His later writings include the Kīmiyā-yi Saʿādat (The Alchemy of Happiness), a vernacular Persian abridgement of the Iḥyāʾ aimed at lay readers, and the Mishkāt al-Anwār (The Niche of Lights), a short treatise on the divine light that Ibn ʿArabī would later read closely. He died in Ṭūs in December 1111 at fifty-three. His autobiography remains in print in dozens of languages. The Iḥyāʾ in its forty-book entirety is still a working text in Sunni religious education across the Arabic-speaking world.