The Meaning of Masonic Symbols – The Working Tools Series

The Plumb

By Steve McCall, Owner of Macoy Publishing & Masonic Supply

The meaning of the Plumb – Finding your true moral line of conduct.

Masonic Symbols: Plumb, Square, and Level Brethren, as we continue our journey through the working tools, we come to an instrument that is often overlooked, yet essential for the stability of any structure. While the Gavel shapes the stone, the Plumb ensures its direction is true. In operative masonry, it is used to try perpendiculars, but for us, it is a constant reminder of how we must stand before the world.

In our manuals and monitors, we are taught that: "The Plumb is an instrument used by operative masons to try perpendiculars. But we as Free and Accepted Masons are taught to make use of it for the more noble and glorious purpose. It admonishes us to walk uprightly in our several stations of life before God and man."

What did the Classic Masonic Authors say about the plumb?

  • Albert Mackey, in his encyclopedia, defines it as "a symbol of rectitude of conduct, and inculcates that integrity of life and undeviating course of moral uprightness which can alone distinguish the good and just man." Mackey emphasizes that this requires "unerring principles of right and truth," calling the Freemason to "neither bend beneath the frowns of adversity nor yield to the seductions of prosperity."

  • Robert Macoy in his Cyclopedia, adds that the Plumb-Line allows us to "Proceed straight forward in the paths of virtue and honor, and faithfully to perform those duties the Craft requires of us." He further warns that "It demands constant attention on the part of every Free and Accepted Mason."

The Plumb does not always get the attention of other symbols, often playing a supporting role to the Square and Level. Think of it as the tool used both before and after the hard work. You use it first to mark the line you intend to carve, and finally to measure the finished work.

In speculative Masonry, "rectitude of conduct" isn't about being haughty or superior. While popular culture and politics often twist the words "right" and "truth" to meet personal goals, the Plumb reminds us to measure our behavior not by our own senses, but by the Supreme Architect's design. We find this true plumb-line by seeking guidance from trusted sources—not just those that think like us—and a wide range of Brothers who will provide a complete perspective.

What can you do this week to find your Moral Plumb-Line?

This week’s challenge is to find a new perspective. Identify a friend or Brother who has a different outlook or opinion than yours. Ask them to help you better understand their position. Approach them with respect, stating clearly that you want to learn and are not interested in a debate. Find a quiet place, listen without belittling them, and you may find a new plumb-line for your own moral character.