Just before takeoff on an airplane flight, the stewardess reminded Mohammed Ali to fasten his seatbelt. "Superman don't need no seatbelt," replied Ali.

"Superman don't need no airplane either," retorted the stewardess. Ali fastened his belt. I like that story for two reasons. One I admire the quick wit and response of the stewardess. Arrogant braggers need to be brought down to size.

Two, no matter who we are, none of us is self-sufficient. We can't make it on our own. There is no Superman. We better fasten our seatbelts. And one of the ways to do it is to practice gratitude.