The story is told that Sir Christopher Wren, the architect of the magnificent St. Paul's Cathedral in London, would often wander unrecognized through the structure, noting the progress being made during the many years of its construction. According to the story, he would sometimes ask a simple question of the workers he encountered: "What are you doing?" He received many replies, most of them like this: "I'm putting in my eight hours"; "I'm laying stones"; "I'm just keeping the boss off my back"; "I'm trying to feed and clothe my children"; "I'm putting in a window." One day he stopped a young man who had the least prestigious job on the whole project—carrying heavy loads of mortar to the stone masons. When he asked him the question, "What are you doing?" the young man stopped, smiled, and gesturing toward the heavens, declared, "I am helping God and Sir Christopher Wren build this beautiful cathedral."