Creativity is an odd thing. Best not to think to deeply about it.
My e-book folks are working on the cover for Portal, and they asked me to come up with a tag line for it. A tag line summarizes a book in about twenty words or less, in a way that will make the casual reader want to buy the thing. Tag lines are hard. I don’t do tag lines. My brain was an utter blank for a week, so I started writing an email to them saying we’ll have to do without one.
And then creativity happened.