AL-GHAZALI

Abu Hamid Muhammad al-Ghazali was born in 1058 CE in Tus, a city in Khorasan (northeastern Iran). His father, a wool-spinner of modest means but deep piety, died young, entrusting his two sons to a Sufi friend. The friend educated them until his money ran out, then sent them to a madrasa where they could study for free. Poverty and Sufism: these shaped al-Ghazali from the beginning.

His intellect was extraordinary. He studied under al-Juwayni, the greatest theologian of the age, and quickly surpassed him. By his late twenties, he was a recognized master of Islamic jurisprudence (fiqh), theology (kalam), and philosophy (falsafa). The Seljuk vizier Nizam al-Mulk, patron of scholars and founder of the Nizamiyya madrasa system, appointed al-Ghazali to the Baghdad Nizamiyya in 1091. He was 33 — the most prestigious academic position in the Islamic world.

For four years, he flourished. He taught hundreds of students, wrote refutations of Ismaili heretics, engaged with philosophers. He composed the Maqasid al-Falasifa (Intentions of the Philosophers), a summary of Avicenna’s philosophy so clear that Latin readers later mistook it for endorsement. Then came the Tahafut al-Falasifa (Incoherence of the Philosophers), his devastating attack. Philosophy, he argued, failed on its own terms: the philosophers contradicted themselves on the eternity of the world, God’s knowledge, and bodily resurrection. On these points, they committed kufr — unbelief.

But the victory felt hollow. In 1095, al-Ghazali suffered a crisis. He couldn’t eat; food stuck in his throat. He couldn’t speak; his tongue wouldn’t move. He couldn’t teach. Doctors diagnosed no physical illness. The problem was spiritual: he saw that his teaching was motivated by ambition, not truth; his knowledge was theoretical, not lived; his soul was sick.

He abandoned everything. He resigned his position, gave away his wealth, arranged for his family’s support, and left Baghdad secretly, pretending to go on pilgrimage. For eleven years, he wandered. He lived in the Umayyad Mosque in Damascus, practicing Sufi disciplines. He visited Jerusalem, meditating in the Dome of the Rock. He made pilgrimage to Mecca and Medina. He sought, through practice, the certainty that theory couldn’t provide.

What he found was dhawq — “taste,” direct experiential knowledge of God. The Sufis, he concluded, were right: truth is not reached by argument but by transformation. Purify the heart; discipline the ego; practice remembrance of God (dhikr); and what the prophets described becomes real in experience. This is not anti-intellectual; al-Ghazali never abandoned reason. But reason is preparatory; experience is culminating.

He returned to teaching in 1106, at Nizam al-Mulk’s son’s request, but reluctantly and transformed. He taught Sufism alongside law and theology. His great work, the Ihya Ulum al-Din (Revival of the Religious Sciences), integrated outward observance with inward spirituality, law with mysticism, scholarship with practice. It became the most influential work of Islamic spirituality ever written.

He died in 1111 CE in Tus, where he had been born 53 years earlier. His brother Ahmad, also a Sufi, was with him. He had come full circle — but transformed. The scholar who had held the greatest chair in Islam found that only God could fill the void.

Al-Ghazali’s thought moves through three phases: demolition, reconstruction, and integration.

The demolition: Tahafut al-Falasifa attacks the philosophers on twenty points. Three are charges of outright unbelief (kufr). First, the world’s eternity: Avicenna held that the world emanates necessarily and eternally from God; al-Ghazali defends temporal creation. Second, God’s knowledge: Avicenna held that God knows only universals, not particulars; al-Ghazali insists God knows everything. Third, bodily resurrection: Avicenna spiritualized the afterlife; al-Ghazali defends physical resurrection as the Quran teaches. On other points, he charges contradiction or incoherence. The philosophers fail by their own standards.

His attack on causation is especially famous. Avicenna (following Aristotle) held that causes necessitate effects: fire necessarily burns cotton. Al-Ghazali denies this. We observe conjunction — fire touching cotton, cotton burning — not necessary connection. God creates each event directly; the regularities we observe are God’s custom (‘ada), not nature’s necessity. God could, if He wished, have fire not burn. This occasionalism (God as the only true cause) undermines natural science’s claim to knowledge of necessary truths — though al-Ghazali accepts science’s practical value.

The reconstruction: having demolished philosophical certainty, al-Ghazali doesn’t embrace fideism. He examines other paths. Kalam (theology) proves God’s existence and attributes but doesn’t satisfy the heart. It’s defensive, reactive, intellectual. The Sufis offer something more: direct experience (dhawq, “taste”) of divine realities. Not belief about God but encounter with God. This requires not argument but practice: purification, discipline, remembrance, surrender.

The integration: the Ihya unites outward and inward, law and spirit. Every act of worship has an outer form (fiqh, jurisprudence) and an inner meaning (haqiqa, reality). Prayer without presence of heart is empty; presence of heart without correct form is innovation. The Sufi who neglects the law is as mistaken as the jurist who neglects the heart. Al-Ghazali maps every aspect of Muslim life — worship, transactions, vices, virtues — showing both dimensions.

His psychology is sophisticated. The heart (qalb) is the spiritual center, capable of knowing God. But it is obscured by desires, attachments, habits — the “rust” that accumulates through heedlessness. Spiritual practice polishes the heart until it becomes a clear mirror reflecting divine light. The stages of the path — repentance, patience, gratitude, fear, hope, love — are stations (maqamat) the seeker traverses. Beyond stations are states (ahwal) — transient experiences granted by God, not earned through effort.

His epistemology distinguishes levels of certainty. Intellectual knowledge (‘ilm) is necessary but not sufficient. Certain knowledge (yaqin) comes through direct experience. The difference is like knowing the definition of health versus being healthy, knowing the definition of drunkenness versus being drunk. The Sufis are drunk; the philosophers only know the definition.