Here’s a rule of thumb that’s important, and the older I get, the more important I think it is. When I can do something, and somebody wants me to do it, I have to do it. The great tragedy of life is not to be needed. As long as you are able and willing to do things for people, you will be needed. Of course, you are able; and if so, you can’t say no. My mother is seventy-seven. In seventy-seven years, she has never said no. Today, she’s so much in demand by fourteen grandchildren and countless neighbors that her presence is eagerly contended for.