As everybody knows, individuality is one thing and personality is another. A soul is individual, but without a personality. Personality is built after one was born. What the soul has brought along is hands and legs and face, but not personality; this is made here on earth. Some hereditary factors that contribute to personality development do so but some potential environmental influences help to shape personality. Usually when we talk about someone's personality, we mean the features that make that person different from other people, perhaps even unique. This aspect of personality is called individual differences. For some theories, it is the central issue. These theories often spend considerable attention on things like types, traits and tests that help us to categorize or compare people who are different in many ways.