One kind of knowing holds the joint angles, the depth, the reason the second cue beats the first.
Another kind holds what the third set feels like at that weight on that evening.

I had assumed the first would arrive at the second at a discount.
It does arrive. It arrives at precisely the rate it arrives for everybody,
by repetition, in tissue, at the full price,
and the fourteen months bought me not one week off the bill.

The Book of the Scholar — Arrival 39:4