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Al-Ghazali

Original nameAbu Hamid al-Ghazali

Persian Philosopher and Theologian, an Important Critic of Rationalist Philosophy Within Islam

Remembered for a Single Line · Small Roles, Famous Names

Islamic TheologySufismCritique of Philosophical Rationalism

Who they are

Al-Ghazali (c. 1058–1111) was a Persian philosopher and Islamic theologian who in his early years studied deeply the rationalist systems of Aristotelian philosophy and of Islamic philosophers (such as Ibn Sina), yet later, in his chief work The Incoherence of the Philosophers, systematically criticized this rationalist system, pointing out that the pure rational argument on which the philosophers relied is in fact full of inner contradiction and arbitrary presupposition on such fundamental questions as "whether the world is eternal" and "whether causation is necessary," and cannot truly reach indubitable truth. In his later years he underwent a profound spiritual crisis, for a time abandoning his comfortable academic post to devote himself to Sufi mystical practice, holding that truly indubitable religious conviction must in the end rely on direct mystical experience and the inner confirmation of faith rather than fragile rational argument — this intellectual journey of "using reason to question reason, and at last turning to mysticism" profoundly shaped the overall course of Islamic philosophical thought for centuries after.

Primary sourcesAl-Ghazali, The Incoherence of the Philosophers, Deliverance from Error

Key stories

The Rational Critique of The Incoherence of the Philosophers

Al-Ghazali systematically examined the rationalist systems built by Islamic philosophers such as al-Farabi and Ibn Sina with the aid of Aristotelian logic, pointing out that their philosophical conclusions — such as "the world is eternal and without beginning" and "God knows only universal laws and not particular concrete things" — in fact fundamentally conflicted with Islamic orthodox belief, and were themselves not irrefutable even on the level of pure rational argument — a work that later prompted Ibn Rushd to write The Incoherence of the Incoherence in pointed response, one of the most famous intellectual debates in the history of Islamic philosophy.

A Spiritual Crisis Mid-Career

While al-Ghazali held a highly prestigious teaching post in Baghdad, he suddenly fell into a profound spiritual and religious crisis, for a time losing the power of speech, and at last resolutely resigned his post to wander incognito for more than a decade, devoting himself to Sufi mystical practice; only in his later years did he take up the pen again, writing this journey of spiritual seeking into his autobiographical work Deliverance from Error (not the same book as Maimonides’s similarly titled work), recording the full course of his mind from rational philosophy to the conviction of mystical experience.

Relationships

Nemesis

📗Ibn Sina　In The Incoherence of the Philosophers he systematically criticized the Islamic rationalist philosophical tradition represented by Ibn Sina

Echoes today

Below are how modern works borrow or reinterpret this name or story — not the original material. The two differ, so keep them apart.

The continuation of the Sufi tradition of practiceHis late intellectual path of reconciling orthodox theology with mystical practice still profoundly shapes the religious practice of the Sufis in the Islamic world.

Appears in

The Middle Ages: The Reconciliation of Reason and FaithMaimonides Reconciles Reason and Law, al-Ghazali Criticizes Philosophical Rationalism

⏳ Who lived at the same time as Al-Ghazali? →🔗 Who taught whom →

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