Al-Ghazali Writes Ihya Ulum al-Din

# Al-Ghazali Writes Ihya Ulum al-Din

The Ihya Ulum al-Din (Revival of the Religious Sciences), written by Imam Abu Hamid al-Ghazali between approximately 488 and 495 AH, stands as one of the most significant and beloved works in the history of Islamic literature. Composed in the aftermath of a profound spiritual crisis that drove al-Ghazali to abandon the pinnacle of academic prestige, the Ihya represents a sweeping effort to reconnect Islamic scholarship with the living realities of faith, purification, and relationship with Allah.

The Author — Abu Hamid al-Ghazali

Muhammad ibn Muhammad al-Ghazali was born in 450 AH in Tus, Khorasan (in modern-day Iran). He demonstrated exceptional scholarly aptitude from an early age, studying first in Tus, then in Jurjan, and then in Nishapur under the great theologian al-Juwayni (Imam al-Haramayn). After al-Juwayni's death, al-Ghazali came to the attention of Nizam al-Mulk, the great Seljuk vizier, who brought him to his court and eventually appointed him to the chair of the Nizamiyyah madrasa in Baghdad in 484 AH.

At Baghdad, al-Ghazali reached the summit of worldly scholarly success. He was acknowledged as the foremost scholar of his age, students flocked to his lectures from across the empire, and his brilliance in theology, jurisprudence, and philosophical critique was unrivaled. He had demolished the pretensions of Islamic Aristotelian philosophy in his Tahafut al-Falasifa (Incoherence of the Philosophers) — a work of devastating logical rigor that exposed the internal contradictions of the philosophic positions adopted by al-Farabi and Ibn Sina. He had mastered Shafi'i jurisprudence at the highest level. He had surveyed the Ismaili Batini doctrine and refuted it. By any external measure, he was Islam's most complete scholar.

The Spiritual Crisis

Yet in 488 AH, al-Ghazali experienced a profound inner crisis. In his autobiographical Deliverance from Error (al-Munqidh min al-Dalal), he describes this period with unusual candor. He began to question whether his scholarly activity was genuinely oriented toward Allah or whether it had become motivated by reputation, the approval of others, and the pleasures of intellectual mastery. The recognition struck him with devastating clarity: a scholar who performs religious duties for the sake of worldly recognition has fallen into the very riya (ostentation) that the Prophet condemned as a form of shirk.

For months, he was paralyzed — unable to teach, unable to write, physically ill with what sounds like a psychosomatic crisis. Finally, trusting in Allah and abandoning his prestigious position, he left Baghdad in 488 AH. He went first to Syria, spending time in the Umayyad Mosque of Damascus in isolation and dhikr. He visited Jerusalem and Hebron, performed the hajj, returned briefly to his homeland in Khorasan, and then withdrew to his hometown of Tus for several years. During this period of approximately ten years, he studied Sufism experientially, practiced spiritual disciplines, and wrote the Ihya.

The Ihya — Structure and Content

The Ihya is organized into four quarters (rub'), each containing ten books:

Quarter 1: Acts of Worship (Ibadat): The first quarter covers the pillars of Islam — purification, prayer, zakat, fasting, hajj — but in a way that goes beyond legal rules to explore the inner dimensions and proper spiritual orientations of each act. Al-Ghazali's treatment of prayer, for instance, includes not only the legal requirements but the states of the heart that should accompany each movement and utterance.

Quarter 2: Customs and Social Conduct (Adat): This quarter covers food and drink, marriage, earning a livelihood, friendship, travel, enjoining good and forbidding evil, and the conduct of scholars. Al-Ghazali addresses the ethics of everyday life with a depth and psychological acuity that had rarely been applied to these subjects in earlier Islamic literature.

Quarter 3: The Destructive Vices (Muhlikat): The third quarter addresses the great spiritual diseases — the diseases of the heart that separate a person from Allah. It covers gluttony, lust, the love of wealth, the love of status, pride, ostentation, envy, anger, and other blameworthy traits. Al-Ghazali's treatment of each vice includes its definition, its symptoms, its causes, and the spiritual disciplines that can cure it.

Quarter 4: The Saving Virtues (Munjiyat): The final quarter addresses the spiritual states that bring a person close to Allah — repentance, patience, gratitude, hope, fear of Allah, asceticism, tawhid, tawakkul (reliance on Allah), love of Allah, longing for Allah, and finally, the reality of death and what lies beyond it. The Ihya ends with one of the most profound discussions of death and the afterlife in Islamic literature.

Theological Orientation

The Ihya is firmly grounded in the Sunni tradition. Al-Ghazali's theology is broadly Ash'ari — the school of which he was one of the greatest representatives — though scholars have noted that the Ihya itself is less technically philosophical than his theological works and more rooted in Quranic language and hadith.

Al-Ghazali drew extensively on Sufi literature and practice, citing works by al-Muhasibi, al-Qushayri, and other earlier masters of spiritual purification. However, he was careful to anchor this material in Quran and authentic Sunnah, and he explicitly rejected Sufi practices and formulations that he considered theologically problematic. The Ihya represents al-Ghazali's attempt to synthesize the outer scholarship of fiqh and theology with the inner science of the heart that the Sufi tradition had developed — to create a unified vision of Islamic life that was simultaneously legally orthodox and spiritually alive.

Reception and Legacy

The immediate reception of the Ihya among orthodox scholars was not uniformly positive. Some Maliki scholars in the Maghrib, concerned about its extensive use of unverified hadiths and its Sufi elements, condemned it. The Andalusian scholar Ibn al-Jawzi later criticized certain aspects of the work. The Hanbali tradition was at times wary of its Sufi dimensions.

But the Ihya proved irresistible to the broad mass of Muslim scholars and readers. Its comprehensiveness, its psychological depth, its integration of law and spirituality, and its evident sincerity — the voice of a man who had genuinely struggled and genuinely found — gave it an authority that purely academic works could not match. Within a generation of its composition, it had spread across the Islamic world from Morocco to Central Asia.

The great Moroccan hadith scholar al-Iraqi spent years verifying the hadiths cited in the Ihya, and his verification notes have been transmitted alongside the text in many manuscript traditions. Subsequent scholars such as al-Zabidi produced multi-volume commentaries (Ithaf al-Sada al-Muttaqin) that remain important scholarly resources.

The Ihya has never gone out of use. It is studied in madrasas across the Islamic world, translated into dozens of languages, and read by ordinary Muslims seeking guidance on the inner life of faith. Its description of al-Ghazali himself — "a man revived the religion at the turn of the century" — became an established judgment in Islamic tradition: many scholars applied to him the hadith that "Allah sends a mujaddid (renewer) to this ummah at the beginning of each century."

Al-Ghazali died in 505 AH in his hometown of Tus, reportedly in a state of scholarly contentment after years of teaching and writing. He is buried there. The Ihya is his enduring contribution to Islamic civilization — a work that reminded the Muslim world that scholarship without sincerity is nothing, and that the ultimate purpose of all religious knowledge is drawing closer to Allah.