To Paul A. Samuelson, professor of economics at Massachusetts Institute of Technology, Nobel Laureate, investment sage. In 1948 when I was a student at Princeton University, his classic textbook introduced me to economics. In 1974, his writings reignited my interest in market indexing as an investment strategy. In 1976, his Newsweek column applauded my creation of the world’s first index mutual fund. In 1993, he wrote the foreword to my first book, and in 1999 he provided a powerful endorsement for my second. Now in his ninety-second year, he remains my mentor, my inspiration, my shining light.