How does the Royal Arch degree complete the Craft legend?

The Masonic legend finds its fulfillment in the Royal Arch, which Dr. W. J. Chetwode Crawley described as the completing part of the narrative rather than a separate entity, observing that without it the cope-stone is removed and the building left visibly incomplete 1. Originally forming an integrated part of the Third Degree, the Royal Arch expands and concludes the sequence 2, leaving the work unfinished if its attainment is omitted 2.

In symbolic terms, while the First Temple of Solomon represents this present life and the search for truth, the Second Temple of Zerubbabel symbolizes the future life and the actual discovery of truth, thereby completing the symbolic circle and perfecting the system 1. Ceremonially, where the Third Degree dramatizes mystical death and revival, the Royal Arch carries that process to its ultimate stage through exaltation into a higher quality of life and consciousness 2.

Present-day practice reflects this structural relationship: the United Grand Lodge of England states that the Royal Arch completes a Mason's journey in Pure Antient Masonry as a fourth element, while the Supreme Grand Chapter records that the Ceremony of Exaltation sees members follow the clues from the Third Degree to complete their progress.