Freemasonry uses symbolism from geometry and architecture as metaphors for building a perfect man. We refer to how the architect aspires to design the perfect building (using the square, compass, level, plumb, trowel, etc.) and then reapply those same instruments to the building of a perfect man (e.g. the square? Square your actions with the square of virtue… the trowel? Spread the cement of brotherly love and affection…) I could go on and on with those because I love the beautiful meaning that they each have! But instead, here’s a quote for you from a beautiful lecture, (from the second degree) entitled “The Letter G”.
“Tools and implements of architecture, symbols most expressive, have been selected by the fraternity to imprint on the mind wise and serious truths, and thus, through a succession of ages, are transmitted, unimpaired, the most excellent tenets of our institution.”
So, a new Mason plays the part of the central figure in 3 beautiful theatrical productions (plays if you will) put on (from memory) by the officers of the lodge. During each of those 3 degrees he hears frequent allusion to the building of King Solomon’s temple. As each tool is mentioned, it is metaphorically applied to the improvement of the individual man.