As Plato once said, "The first and best victory is to conquer self. Self-discipline is the ability to conquer oneself and control one's actions. The importance of this attribute was discovered during the early age of Plato, and continues to make an impact on the lives of people today.
Self-discipline is exhibited through many facets of one's life. Those who control their body by their mind are often seen on the exterior as possessing self-discipline, while those who control their mind by their body are perceived as having no discipline. When one knows they are obliged to do something, self-discipline is the ability of one's mind to convince the rest of their body to get up and get to work, whether it be homework, cleaning, or walking the dog. Also, self-discipline is taking care of one's body, by eating correctly, exercising regularly, and avoiding bad habits. One must be able to resist the temptation of sweets and go to the gym instead of spending all afternoon on the couch flipping channels. Often appalling emotions are aroused in everyday life. Self-discipline is shown when one can keep their temper, restrain from sobbing, mask their disappointments with a smile, etc. The list is endless, but the point is that being able to control one's emotions is another sign of having control over oneself, and thus demonstrating self-discipline.
One strives to control all aspects of their life, but inevitable restrictions are unsurpassable, and one often fails. It is, however, feasible to control oneself. Exhibiting self-discipline illustrates that one is strong-minded and completely in control of all actions.