Leave Yourself Wanting More

You’ve heard the show business adage, “Always leave them wanting more,” meaning an entertainer should exit the stage before the audience gets bored. By the same principle, novelist and poet Helen Dunmore said you should “finish the day’s writing when you still want to continue.”

Why is that? There seems to be some important facet of human nature at work here. To cite another example of this phenomenon, I used to read to my children when they were quite young, but I tried to observe them as I r...