Success: a Marathon, Not a Sprint
The single most important quality of success is self-discipline. Self-discipline means that you have the ability, within yourself, based on your strength of character and willpower, to do what you should do, when you should do it, whether you feel like it or not. Character is the ability to follow through on a resolution after the enthusiasm with which the resolution was made has passed. It is not what you learn that is decisive for your future. It is whether or not you can discipline yourself to pay the price, over and over, until you finally obtain your objective.
-Brian Tracy
