Experience
A man, after 25 years with one company, was still doing the same old job and drawing the same salary. Finally he went to his boss and told him he felt he had been neglected. “After all,” he said, “I’ve had a quarter of a century of experience.”
“My dear fellow,” sighed the boss, “you haven’t had a quarter of a century of experience, you’ve had one experience for a quarter of a century.”