Many consider Imam Abu Hamid al-Ghazali the all-time greatest scholar of Islam. One of the great legal scholars of his time (1058-1111), he was, also, one of the foremost scholars of theology, philosophy and Sufism. In the realm of Sufism, his writings on the interrelation of law, theology and mysticism were central in establishing Sufism as a core dimension of Orthodox Islamic practice. Muslim communities all across the world today still base much of their practice of Islam on Ghazali's writings. Forty Foundations of the Religion is Ghazali's own summary of his magnum opus, The Revival of Religious Knowledge, which he described as the 'very essence of the knowledge of the Qur'an'. The Foundations are a brief and powerful summary of Islamic faith, worship, law and spirituality. This is the first publication of significant portions of the Foundations in English. Original translations of selected highlights are accompanied by insightful commentary that makes the core message of this great spiritual master relevant to anyone seeking a balanced understanding of Islam. This volume will ,also, attract those who are interested in Eastern spirituality, Sufism and interfaith dialogue. Foundations offers a concise and affordable alternative to the extensive (and expensive) translations of the original Revival of Religious Knowledge.