Ego means "I" in Latin. To an egocentric person, I is the most important word in the language. Great artists and writers are often egocentrics; such people can be hard to live with, though their egocentricity, an unfortunate side effect of their talent, is often forgiven. But ordinary egocentricity, which shows up as selfishness, lack of sympathy, and lack of interest in other people, usually has little to do with any personal talent or success.