In California Masonry, an applicant for the degrees of Masonry must be a believer in a Supreme Being and a future existence. Why does California Masonry require this belief? What elements must be present for there to be such a belief? How does this requirement compare to the practices of those Masonic obediences which are based on freedom of conscience regarding belief in a supreme being? In this presentation, these questions will be considered in the context of the history of this requirement and Freemasonry’s understanding of geometry as a hermetic symbol.