In Creativity and stretching the sweatshirt he compares the act of being creative with stretching out a sweatshirt.
For me, creativity is the stuff you do at the edges. But the edges are different for everyone, and the edges change over time. If you visualize the territory you work in as an old Boston Bruins sweatshirt, realize that over time, it stretches out, it gets looser, the edges move away. Stuff that would have been creative last year isn't creative at all today, because it's not near the edges any more.The exercise at the edges is an adventure in search of new and different ideas. Its not easy to get there and its hard to convince others to come with you if they are not ready.
To get to the edges requires two different travel plans, depending on where you are.
1. If you want to be creative, understand that you'll need to get to the edges, even if the edges have moved. Being creative means immediately going to the place the last person left off.
2. If you are "not creative," if you are the sort of person that gets uncomfortable being creative or has been persuaded you're not capable, don't worry about it. Just stretch the sweatshirt in your spare time, watch the creative things other people have done, keep up with the state of the art. Then, when you do your "not creative" thing, most people will think it's pretty creative indeed.