The Four Stages of Learning

I recently started learning to play the piano after saying for many years that I wanted to do it. Doing this has made me realise that there seems to be a pattern emerging in my learning of both the piano and drawing, which perhaps may apply to all subjects, or at least creative ones. I have isolated things into four stages. I'd be interested to hear if anyone else feels this way.

1. I begin a session, struggling to some degree with achieving what I want to do.
2. I start to get somewhere, managing to produce some decent results.
3. I start to tire, making many mistakes; even stupid ones that I hadn't been making earlier. At this point I consider giving up for the time being as I feel like I'm not going to be able to take any more in.
4. Suddenly, if I push through the feeling that I should stop, I start producing real results. At this point I'm not even thinking. I forget about technique; about whether I'm doing the right thing or not. My body starts to just do its own thing and I'm surprised as I watch it comfortably do what only moments ago had seemed too much. Mistakes still happen, but they are far less frequent and they concern me less. If I can reach stage 4 then I get a great feeling of euphoria that lasts with me after I stop the session.