كتاب العلم، العربية
للإمام الحارث بن اسد المحاسبي قدس الله سره، المتوفي 243هه
Kitab-ul-Ilm, Arabic, 166 pages, by the great saint and Sufi master Harith ibn Asad Muhasibi (d.243 AH).
رساله قدسیه، فارسی
خواجه محمد پارسا بخاری نقشبندی رضی الله عنه
Risalah Qudsiyah, Persian, by Khwaja Muhammad Parsa Bukhari (d.822 AH). Published from Rawalpindi, Pakistan in 1975.
The Revival of the Religious Sciences Iḥyāʾ ʿulūm al-dīn) إحياء علوم الدين is widely regarded as the greatest work of Muslim spirituality.
By Imam Abu Hamid al-Ghazali (450-505 AH) امام ابو حامد الغزالي
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.