“Dean Kendall of the University of Michigan music school once told me a story: ‘When I was a little boy, I was put in charge of a little retail operation that included candy. My father saw me take a piece of candy and eat it. I said, “Don’t worry. I intend to replace it.” My father said, “That sort of thinking will ruin your mind. It will be much better for you if you take all you want and call yourself a thief every time you do it.”’ ”