Al-Ghazali is the most important philosophical theologian of classical Islam, and Moderation in Belief is among his most important works. It sets out al-Ghazali's Ash?arite theology with unusual clarity and provides important background for such well-known works as his autobiographical Deliverance from Error and his attack on Avicenna in The Incoherence of the Philosophers. This first English-language translation, with notes that bring out the argumentation and background of the work, is thus very much to be welcomed.