Tim Gallway writes wondeful books on performance and engagement in sports and work.
In every human endeavor there are two arenas of engagement: the outer and the inner. The outer game is played on an external arena to overcome external obstacles to reach an external goal. The inner game takes place within the mind of the player and is played against such obstacles as fear, self-doubt, lapses in focus, and limiting concepts or assumptions. The inner game is played to overcome the self-imposed obstacles that prevent an individual or team from accessing their full potential. Tim Gallway
Photo Credit: basketball court by http://flickr.com/photos/mioi/68561164/