I suppose the compasses are not technically a working tool, but they are my favorite symbol in all of masonry. All of my life I have been a man of opinions, and my ambition and passions have brought me success, but with costs. I'm a natural firebrand.
As I am now my grandfather's primary care giver, I have observed daily how he allows others to get the last word, to state his opinon and move on, and to maintain his humility. This strengthens the weight of his words rather than weakens over the long haul. And it reflects the genuine respect he has for others. I have observed the same behavior in a number of my worthy brethren.
So I take very seriously the idea of moderation, and I think of the compasses very often. I think what they represent are the key to being a better man, for me.
The common gavel and trowel, after that, in equal measure.