Al Ghazali · Theology
How al-Ghazali doubted everything - the senses, then reason itself - in a desperate search for unshakeable knowledge, six centuries before Descartes.
Abu Hamid al-Ghazali was, by his thirties, the most celebrated scholar in the Islamic world - a star professor in Baghdad, master of law and theology. And he was in crisis. From his youth he had been driven by a fierce hunger to know things as they really are, not merely on the authority of others. He could not bear to hold beliefs simply because he had been raised in them. So he set out to find knowledge so certain that no doubt could ever touch it - and the search nearly destroyed him.
Al-Ghazali began with the knowledge that seems most secure: the evidence of the senses. Surely seeing is believing? But the senses, he realised, constantly deceive us. A stick in water looks bent; a distant tower looks small and round when it is large and square; a shadow seems still yet is always moving; the sun looks the size of a coin though it is vast. If the senses can be wrong about such ordinary things, how can they be the foundation of certain knowledge? One by one, the testimonies of sight, touch, and hearing failed his test of indubitability.
For about two months, al-Ghazali tells us, he was a thoroughgoing skeptic - ‘in heart though not in word.’ He could find no argument to rescue reason, because any argument would have to use reason, and so could not prove reason without circularity. What cured him was not a proof at all. It was, he says, ‘a light which God Most High cast into my breast’ - a restoration of trust in reason’s basic certainties, given rather than argued. The escape from total doubt, he concluded, cannot itself be a product of reasoning; it rests on a confidence that is granted, an immediate certainty deeper than proof.
This is the opening of the lesson. The rest — the dialogue, the primary source, and the recall — is in the app.
You learned that al-Ghazali sought knowledge immune to all doubt and found ordinary certainties failing the test. Reconstruct his path into doubt and how he escaped it, in your own words.
Leads to Rene Descartes.
Begin this lesson →epoché — a humanities education that remembers you.