Self-Discipline 

Self discipline is what makes a person who they come to be for the rest of their lives. It is a self made promise that determines self-control, self-mastery, willpower, strength of mind, and obedience with exactness. An example of self-discipline can be seen in the cartoon character Popeye. When things seem to be going wrong, he consumes his spinach to strengthen himself so he can take on what ever challenge that seems to be in his way.