Real, constructive mental power lies in the creative thought that shapes your destiny, and your hour-by-hour mental conduct produces power for change in your life. Develop a train of thought on which to ride. The nobility of your life as well as your happiness depends upon the direction in which that train of thought is going.
Laurence Johnston Peter (September 16, 1919 – January 12, 1990) was a Canadian educator and "hierarchiologist" who is best known to the general public for the formulation of the Peter principle.