This story was shared with me several years ago. On November 18, 1995, Itzhak Perlman, the violinist, came on stage to give a concert at the Lincoln Center in New York City. If you have ever been to a Perlman concert, you know that getting on stage was no small achievement for him. He was stricken with polio as a child and has braces on both legs and walks with the aid of two crutches. To see him walk across the stage one…