What are the evolutionary developments in the philosophies and core tenets of Holy Royal Arch Chapter from Craft?

The Holy Royal Arch serves as the expansion and completion of the Third Degree, from which it was originally detached 1. While the preliminary Craft degrees focus on purifying the temporal mentality and physical nature, Wilmshurst argues that Craft work remains unfinished without the Royal Arch, which represents the ultimate attainment of human regeneration and higher consciousness 1.

Philosophically, the shift moves from the moral discipline and mystical death dramatized in the Craft to a realization of spiritual integration and a new order of life 1. Wilmshurst interprets this process as a journey from the disordered, material state of "Babylon" to the spiritual "Jerusalem," where the fallen temple of the human soul is re-erected 1.

A key symbolic shift marking this evolution is the movement of the Sacred Symbol of the Grand Geometrician of the Universe 1. Located overhead in the ceiling during the Craft degrees, the symbol descends to the floor in the Royal Arch, which Wilmshurst equates with the divine spirit descending into human nature 1.