While the square and compasses with the letter
"G" is widely employed as the emblem of the
Masonic Fraternity it is relatively new.
The square and compasses alone began to be
used in the early 19th century. The "G" came into
the picture near the end of the century when
American jewelers began adding the "G" for
artistic purposes. While many Masonic symbolists
have tried their hands at interpreting the
emblem, the simple meanings taught all Masons
remain the best: (1) The square teaches us to
square our actions by the square of virtue; (2)
the compasses teach us to circumscribe our
desires and keep our passions within due bounds,
while (3) the "G' reminds us that as an
understanding of geometry was central to
operative Masons so should God be central in the
lives of speculative Masons. (
Source: Bro. S. Brent Morris,
author, Masonic Philanthropies)