Rev. The great prophet Amos was given a vision of a plumb bob that would become the symbol of the standard by which God’s people should live. It represents a standard by which believers must live and a standard by which divine judgment is measured.
A plumb bob is a length of string with a weight attached to the end that is used to check if something, such as a wall, is vertical or tilted at the right angle.
A plumb bob is a light line with a weight (plumb bob) on one end that, when hung next to a workpiece, defines a vertical line. Plumb comes from the Latin plumbum or “lead”, the material that replaced stone as…
The plumb bob in the plumb bob derives from Latin plumbum (‘lead’), the material once used for the weighted plumb bob at the end. The adjective plumb, like the noun aplomb, developed by extension from the term “to stand upright.”
The cornerstone. The first rockfall when building a masonry foundation. As the first laid stone, it becomes the reference point for all further laid stones. Everything finds its definition in this one piece – the cornerstone. That’s how you can tell if it’s right and true.
To make a plumb bob, rub a piece of string with colored chalk and tack it to the top of the wall. Then attach a plumb bob (or other small weight) to the loose end. Hold the bob where it falls naturally and pull the string taut. Then pull and release and let it hit the wall.
The Egyptians invented the plumb bob more than 4000 years ago. It has two humble parts – a cord and a weight. A plumb line was used to mark vertical points critical to the construction of Egypt’s buildings, pyramids, and canals.
“Plumb” is what you call a perfectly vertical line. Vertical means up and down. Something that is “plumb” is perpendicular to the horizon—meaning that when it intersects the horizon, it forms a right angle (90 degrees). You can measure if something is plumb with a plumb bob or spirit level.
In construction or carpentry, the term plumb refers to a line or feature that is perfectly vertical. In engineering design, it represents an imaginary line going straight to the center of the earth. Plumb is the opposite of Level, meaning to be perfectly horizontal.
The plumb bob has been used for many centuries because it is the perfect tool for obtaining an accurate vertical reference. And at Engineer Supply we have some of the best on the market. Whether you are looking for a plumb bob sheath or the product itself, you will find it in our shop.
Many chalk lines can be used as plumb bobs since they are essentially a weight attached to a string. Some even have a pointed base to facilitate accurate marking.
In terms of architecture, a cornerstone is traditionally the first stone laid for a structure, with all other stones laid as a point of reference. A cornerstone marks geographic location by pointing a building in a specific direction.
Christ Jesus is the supreme cornerstone. He is our rock, our tried stone, our head, holding the body of Christ together, guiding our next steps, foremost in all decisions that must be made in every moment of every day. He is the rock that is higher than you.
So when we hear in today’s Gospel the expression, “The stone that the builder rejected has become the cornerstone,” and that it was Jesus Himself who was rejected and put aside – and so are we Grace of death and resurrection – we too can see that God is acting in the struggles and mysteries of our lives.