İksîrü’s-seâdât fî esrâri’l-İbâdât was written by Burhaneddin Ahmed es-Sivasî who is one of the most important figures of Turkish Islamic history and a scholar, sufi, poet, judge and ruler on the year h.798/m.1396 in Sivas. In this book, mysteries of the worship are explained after three complementary introductory chapters regarding the conception of being. The author first deals with the being, its nature and its reason in order to clarify the mysteries of the worship in human mind with a (...) meaningful framework. Then he explains the mysteries of worship by means of verses from the Quran and hadiths. Kadı Burhaneddin interprets the real meanings of worship for human being with the concept of poise. He thinks that worship is the most important means that secure human being against deviations from poise. Putting forward why the religious orders are imposed is a scholarly activity and this activity is broad enough as comprising all religious decrees. Wisdoms, beauties, benefits and utilities within religious orders are known through this activity. This book which is the basic reference of our paper can be included within the scope of the science of hikmetü’t-teşrî (reason of legislation) that explains the causes behind the orders and prohibitions of the religion. Some explanations put forward here should be evaluated having regard to theories of appearance and manifestation. (shrink)