I Am the Greatest
Muhammad Ali is considered the greatest heavyweight boxer of all time. He won 56 out of his 61 professional fights and knocked out 37 opponents. His most famous catch phrase was, "I am the greatest!"
One day, Ali was seated in an airplane when the flight attendant came up the aisle to make sure that all the passengers had their seat belts fastened. Reaching Ali's seat, she asked him to buckle up.
"Hmph!" the champ sneered. "Superman don't need no seat belt!"
The flight attendant smiled sweetly and replied, "Superman don't need no airplane, either."
Ali fastened his seat belt.
The greater our success, the greater the risk of us thinking too highly of ourselves.
— Os Hillman, "The Success Test," The Upside of
Adversity. Cited on: KneEmail.