Back when I was an actively skiing avid skier, we would often say, "If you're not falling down, you're not pushing yourself hard enough."
I remember as a new skier looking at double black diamond slopes that dropped straight down and thinking I had no interest. I thought people who did that were slightly off their rocker. But it turns out that I'm an adrenaline junky. It seems that once I've figured out how to do something, I need to to move on to something harder to keep my interest. The green slopes that once felt so high and steep to me eventually felt flat. The Blues kept my interest for awhile but then I conquered them. The black diamonds weren't far behind, which is how I found myself one day standing at the top of a cliff scared out of my mind but nearly certain that once I leaped off I would be able to stay upright. I didn't, at least not right away.
I find these lessons to hold true to knitting. It's not quite the adrenaline rush of skiing, but it's as much of a mind challenge. This stole on which I'm working - it's probably a black diamond. I'm falling down a lot. But, I'm learning a lot and I'm having a blast with it. It certainly has my attention!