Suppose you have lived your whole life in Centennial, attended only Littleton Public schools, never traveled to another state, let alone another country, never met anyone other than people who live in your neighborhood, never learned a foreign language. Given this scenario, your world might be considered rather small. But now consider all the experiences you have accumulated so far in your life -- the people you've met, the places you've visited, the specialized skills and knowledge you've acquired. Compare yourself to that hypothetical stay-at-home and answer the question "How big is your world?" Consider both its physical and mental dimensions.
