The Revival of the Religious Sciences ( Iḥyāʾ ʿulūm al-dīn ) is widely regarded as the greatest work of Muslim spirituality, and is perhaps the most read work in the Muslim world, after the Qurʾān.

The Revival of the Religious Sciences is divided into four parts, each containing ten chapters . Part one deals with knowledge and the requirements of faithritual purity, prayer, charity, fasting, pilgrimage, recitation of the Qurʾān, and so forth; part two concentrates on people and societythe manners related to eating, marriage, earning a living, and friendship; parts three and four are dedicated to the inner life of the soul and discuss first the vices that people must overcome in themselves and then the virtues that they must strive to achieve. Below are details of the contents of the books, translations (mainly into English) and a link to the original Arabic here for the first time on the internet.