Denyse Schmidt Quilts linked to this article on The Improvised Life blog - here's the key point: "A really big part of improvising/creating/making is getting used to things not looking good while you're working on them."
They're focused primarily on painting or improvising in the article, which are definitely creative activities where you may not know how things are going to end up while you're making them. But I'd argue that this point exists even in carefully-planned creative activities, like non-improvisational quilting. At least this happens for me! I almost always think in the middle of assembling my quilt top that those seams aren't as lined up as well as they should be or maybe those colors don't look as good together as I was hoping they would, or whatever. But usually, when the piecing is done and especially when the quilt is all finished, all of those tiny things I thought "didn't look good" turn out to be completely unnoticeable and the overall finished product is really satisfying. Does this happen to you, too?
The photo is of Einstein's desk hours after he passed away. This just goes to show that even the most brilliant and creative thinkers have some messiness along the way. In fact, I bet the messiness actually helps with the creativity. What do you think?