In David Dunn's book entitled "Giving Yourself Away," he tells of a lesson he learned from a bus driver whom he once had met.

Riding the bus this day, Dunn noticed a driver who was exceptionally cheerful in every imaginable circumstance. There was a kind and happy word from him for everyone who stepped on the bus, and again for everyone who left.

As he was about to get off, Dunn told the driver he was the happiest bus driver he had ever seen and wondered what the reason was. "Well," the driver said, "to be honest, I read in the paper a few months ago about a man who died and lef…