Comment by Dilettante_

This is what came to mind for me reading the article as well: The difference between juggling, rotating, feeling out a thousand puzzle pieces that either fit or don't fit the well-defined hole you have, versus having the hole, having the puzzle-piece-'blank' that you're very slowly and deliberately chipping away at, sanding down, until it fits(as you know from the very start it will).

One is a trickle, the other a rush.