Mental playfulness
If you ever want to find out just how uninteresting you really are, get a job where the quality and frequency of your thoughts determine your livelihood. I've found that the only way I can keep writing every day, year after year, is to let my mind wander into new territories. To do that, I've had to cultivate a kind of mental playfulness.
Bill Watterson, Some thoughts on the real world by one who glimpsed it and fled