Hmmm these Nathan Cole videos are pretty good. Check this out:
He’s talking about a high degree of repetition of playing things correctly. And that makes sense! If you play something over and over again and constantly muck it up, is it ever going to be good? Or maybe it’s slop 20 times and then you get a good one and say “ah, finally!”, then it’s onto something else lol! He’s finding ways to play successfully, even if he has to do what he refers to as “change the rules” in order to get this success. Then he repeats these successes over and over again until he loses focus. I can’t say I’ve tried that often, and it sounds like his bedrock.