The greatness of our lives is often dependent on our vision - our concept of the future and how it could be, our understanding of the present and all that it encompasses and our knowledge of the past and the lessons it has to teach. Narrowness of vision in any of these aspects crimps and constrains the limits of our greatness, preventing us from developing fully. Too much attention to or dependence on any one direction of vision deadens our sense of the others, distorting our growth and encourag.