Having a wheel and four legs of its own
Has never availed the cumbersome grindstone
To get it anywhere that I can see.
These hands have helped it go, and even race;
Not all the motion, though, they ever lent,
Not all the miles it may have thought it went,
Have got it one step from the starting place.
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A grindstone belonged to my grandma's yard when I was little. It stood outside withstanding Wisconsin weather year after year. I saw it once a month or so on Sundays when we visited. I guess it had been my grandpa's and maybe his father's before that but they were already dead by then and I forgot to ask my dad about it too. My dad never farmed for a living and so the grindstone never passed down. He showed me other useful things.
A grindstone must have been handy on a farm in the days of steel plows and scythes. I never saw it make sparks fly but it must have done that in its day. Come to think of it, that's probably why it was outside (and why Frost's grindstone was outside too). It's not the kind of tool to keep and use in a barn around sawdust or straw. But farming changed and that grindstone became a relic
—a sort of lawn ornament and a plaything for me, my brother, and my cousins while the grown-ups chatted inside.
No doubt that grindstone had abetted the killing of countless blades by whetting blades, but those of the surrounding weeds by then outnumbered the kind that this device had sharpened. I thought of none of that then. It was enough to just play with it and turn its heavy wheel. A fixed handle cranked the stone disk around and around. Getting it going really fast and then letting go of the handle made it hard to grab it again without getting hurt
—such was its angular momentum. But that's not what I called that force then. I didn't know what to call that force then
—I just knew that the grindstone had it and I never forgot it. And though that grindstone is long gone, it was a starting place for lessons learned many years on.