What is success?

As my father pointed out to me recently, the most sucessful man is the one nobody misses. He has completed his work so completely and powerfully that it has become a part of the network of society. He has trained able apprentices who can take over for him, who will keep whatever dream he had alive. If a man is truly successful, he will one day quietly and unobtrusively exit the scene, and hardly a soul will notice he is gone.