Al-Ghazali

Abu Hamid Muhammad ibn Muhammad al-Ghazali, honored with the title Hujjat al-Islam (The Proof of Islam), was born in 1058 CE in Tus in Khorasan, Persia. He is widely regarded as the most influential Muslim thinker after the four great imams of law and one of the most important figures in the entire history of religious philosophy. His life describes an arc from brilliant worldly success through a devastating spiritual crisis to a transformed and deeply interior form of scholarship, and that personal drama shaped a body of work of extraordinary range and depth. After the death of his teacher al-Juwayni in 1085, al-Ghazali came to the attention of the great Seljuk vizier Nizam al-Mulk — the most powerful statesman in the Islamic world — who appointed him in 1091 to head the Nizamiyya Madrasa in Baghdad, the most prestigious academic position in Islam. For four years he stood at the absolute summit of Islamic intellectual life, teaching hundreds of students, issuing legal opinions, and writing prolifically. But beneath this public brilliance a private crisis was growing. In his autobiographical 'Deliverance from Error' (al-Munqidh min al-Dalal) he describes with shattering honesty how he came to question whether he could be certain of anything, even the truths of logic and sense perception. He scrutinized in turn the philosophers, the theologians, the Ismaili esotericists, and the Sufis, and concluded that only direct spiritual experience — the inner knowledge of the mystic — could provide the certainty that discursive reason could not. In 1095, at the height of his fame, he suffered a physical and psychological breakdown: he lost the ability to speak in public, was overcome by paralysis of the will, and finally abandoned his post, his salary, and his prestige, leaving Baghdad with only enough for his family's subsistence and withdrawing into a decade of Sufi wandering. He visited Syria, Jerusalem, Hebron, and Mecca, living in solitude and spiritual practice. The fruit of this transformation was his masterwork, 'Ihya Ulum al-Din' (The Revival of the Religious Sciences), composed during this period of withdrawal. This vast four-volume work undertook the complete renewal of Islamic religious life — covering ritual worship, social conduct, the vices and virtues of the soul, and the stages of the mystic path — integrating the rigor of jurisprudence, the insights of theology, and the experiential depth of Sufism into a unified vision of how a Muslim should live. It has been read, studied, and reprinted without interruption ever since and is regarded as the most important work in the Islamic tradition after the Quran and Hadith. His 'Tahafut al-Falasifa' (The Incoherence of the Philosophers) mounted a systematic logical attack on the metaphysical claims of al-Farabi and Ibn Sina, arguing that twenty of their positions were unproven and three — the eternity of the world, God's knowledge of only universals, and the non-resurrection of bodies — were contrary to Islam. This work provoked Ibn Rushd's famous 'Tahafut al-Tahafut' a century later, generating a philosophical debate that resonated through both the Islamic and Latin Christian worlds. In his last years al-Ghazali returned briefly to teaching at Tus at the request of the authorities, then retired to a small Sufi lodge near his home. He died on 18 December 1111 CE, and accounts say he was found in the morning having laid out his funeral shroud, his face toward Mecca. He was fifty-two years old.