I like the story of the young man whose habit of criticizing backfired on him. One evening, while waiting for a bus, he was standing with a crowd of people looking in the window of a taxidermist shop.
In the center of the window was a large owl that attracted the attention of all who passed by.
The self-appointed expert began to criticize the job done on it. "If I couldn’t do better than that," he said pompously, "I’d find another business. Just look at it. The head is out of proportion, the pose of the body is unnatural, and the feet are pointed in the wrong direction."
Just then the owl turned his head and gave the fellow a broad wink. The crowd laughed as the critic slinked away.
Arrogance - When two know-it-alls get together; why do they always disagree?