I started this post when I ran into this quotation.
"I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times."
— Bruce Lee
Commenter Frank Van Haste added this one.
"...there's them that's flown a thousand hours, and there's them that's flown the same hour a thousand times."
It's two different points. The first is that you have to focus, perfect one thing, gain complete mastery over your muscles, mind and reflexes. Continue consistent practice until you get it right. It refers to practice, training, which is what I'm doing when I hack at my flight simulator game.
The second is about breadth of experience. Different conditions, different aircraft, different crews, different places, different mindset, always adding what you learned last time to the new experience. And there's something I've found in aviation, that every thousand hours or so, something happens. Inadvertent IMC, engine failure, smoke monster*, icing, or something you thought you had mastered long ago that suddenly rears its head and becomes an issue again.
I don't think I've practiced ten thousand approaches yet, either different or the same, but I keep practicing.*My affectionate thanks to everyone who has been with me long enough to know I'm not talking about Lost.