Baptism is considered necessary for salvation and exaltation. The Ten Commandments are considered eternal gospel principles necessary for exaltation. Peter's sermon in stresses the resurrection and exaltation. A celestial marriage is considered a requirement for exaltation. Mainstream Mormons, by contrast, believe that a single Celestial marriage is necessary for exaltation. Later revelations dealt primarily with the priesthood, endowment, and exaltation. These categories are Dignity, Detriment, Exaltation and Fall. This led for a time to the exaltation of human reason and rationalism. It opposed the exaltation of saints and the repression by landlords and indigo traders. Humans who fall short of exaltation still receive an immortal physical body. Against the exaltation of authority embodied in the military institution, it opposed its antimilitarism. In the main altar one can see the mosaic of the Exaltation of Adam. This process rapidly expanded their population and led to the exaltation of motherhood. Many of her works, including her "Exaltation of Inanna", were in use for centuries thereafter. Astrologers differ on the signs associated with each planet's exaltation.