Sir W. Hope, Fencing-Master, 1692 - "What he doth, he doth by rule of Thumb, and not by Art."
We all have a "rule of thumb". Like testing the baby's bottle temp by shaking a few drops on the upturned wrist. In Gulliver's Travels it was "twice around the thumb was once around the wrist"
A businessman I knew told me "20% of clients bring in 80% of revenue"

They seem to be generalizations. Assumptions that we use as a folk history of sorts for getting along.

My brother learned, while in Mexico, that the distance, around once, from the heel of the hand to the elbow was equal to your waist size. I tried, when I was younger, and found it was a good way of getting pants when I could not try them on and there wasn't a size label.

I also found using a rule of thumb in judging people just did not work and, if anything, kept me from meeting and knowing some spiritually rich and interesting folks.
I guess what I am mean is that I like the saying "you can't judge a book by it's cover" when referring to people.
I'll leave the rule of thumb to measurement of things, like pants.

"You need a fast boat"
A fast boat. A fast boat to sail somewhere. Well, I said, if I want to get some where fast, I fly on a jet.
"Getting there" What the heck! Sailing is about the journey. When we make a passage from one point to another it is a journey.

The journey itself is life. It is composed of the elements that give depth and richness to us as living, breathing humans. The Journey challenges us, comforts us, teaches us, enrichens us, and helps us grow. The Journey is what sailing, what life is about.

No matter where you go, There you are.

Hit all the rest stops along the road of life. Stop and look at the sunrises, the sunsets, and enjoy all this life has to offer.

Think and live outside the box.