The second time you create that breakthrough
...it only takes a few minutes. Because it's not a breakthrough.
Breakthroughs are slow because you don't know how to do it...
Re-creation is fast, because you already know how.
The art of the breakthrough is the practice of figuring out all the ways to not do it on your way to an insight.
Don't curse the dead ends and the failures. They're the key element of the work you're doing.
We find our way by getting lost. Anything other than that is called reading a map.