Mandeism is the religion of the Mandaean people. It is based on a common history and heritage. There is no fixed set of religious creeds and doctrines. A basic guide to Mandaean theology does not exist. The corpus of Mandaean literature is quite large. It also covers topics such as eschatology, the knowledge of God, and the afterlife. It only does this in an unsystematic manner. Apart from the priests, very few people know it. 