A rudderless ship and a purposeless person are eventually stranded on desert sand.

The goals you set for yourself -- like the rudder of a ship -- will guide you toward your destination, and without them, like a ship without a rudder, you’ll find it impossible to stay the course. Make goal-setting a habit in your life. If you sometimes have trouble staying focused, set small, attainable goals and stick with the job until it’s done. Examples might include finding a faster, more efficient way to do a routine job. Or taking the most difficult jobs first when you have the most energy and your concentration is at its highest level. Save the easiest jobs for last. A few small successes will inevitably lead to bigger achievements. (From Napoleon Hill Foundation)