Perhaps the most famous symbol; the square represents morality ("squaring our actions"), and the compasses represent the ability to "circumscribe" desires and keep passions within due bounds.
Historically, these secrets served as a way for members to identify one another in an era before digital IDs or standardized credentials. According to Wikipedia , the primary secrets consist of: mason Secrets Exposed
A lambskin apron symbolizing innocence and the high standards required of a Mason. Why the Secrecy? Perhaps the most famous symbol; the square represents
Various splinter groups and high-degree systems have had their rituals published in academic journals and by historical societies over the centuries. Perhaps the most famous symbol