I read recently about a door-to-door salesman who had the worst kind of luck. Day after day he’d walk up and down the streets with his product. No one would buy a thing. Every day he knocked on the same woman’s door. Every day she turned him away. Finally, he appeared on her doorstep for the umpteenth time. Just to keep the man from ever returning, the woman made a purchase. The next day, the man rang her
...