DISCIPLINE ROLE IN OUR LIFE 

It is  rightly said that without education no one can succeed.

and especially self discipline no one can succeed until he is self centered 

SELF DISCIPLINE

Self-discipline—what many people call "will-power"—refers to the ability to persist at difficult or unpleasant tasks until they are completed. People who possess high self-discipline are able to overcome reluctance to begin tasks and stay on track despite distractions. Those with low self-discipline procrastinate and show poor follow-through, often failing to complete tasks—even tasks they want very much to complete.

It only differentiate between good and bad

Hence self control or self discipline  is must.