Woolgathering (making sense of nonsense)

When sheep are wandering out in a meadow, passing by prickly bushes and rubbing up against trees, they leave bits of their wool caught on the branches and fence posts. Back when farmers had to keep track of every little thing someone would be sent out to catch those little lost tufts of wool and that was called woolgathering. It was a mindless task and on a nice day it must have been a pleasant one with room to let your mind wander. But the other thing about woolgathering is that you were, of course, gathering lots of little pieces to pull into something large enough to spin so mindless it may be but you were going to end up with something at the end of your walk. The task becomes a lot less pleasant if you’re stuck on the goal — the skein of yarn you’re hoping to spin or the sweater you’re planning to knit — and you’re out there in a meadow where it’s maybe raining and mud