When it comes to goal-attainment, no matter what the goals, only a self-disciplined person can achieve them. There is a concept in psychology known as the Locus of Control which basically states that there are two kinds of persons in the world: Those who believe in their own mastery of fate and others who make excuses in life with the belief that external forces impact their ability to be successful. A person with self-discipline recognizes that they have considerable biological and mental abilities and tries their best to exploit them to achieve success without worrying about others’ behaviors or attitudes. In life, there are always going to be difficult people that are in the environment, whether social or workplace-related, and only a self-disciplined person can maintain their composure and healthy emotional response to achieve success despite these difficult personalities. If the personal goal of success pertains to money, a self-disciplined person will go through the analysis process to determine how best to achieve monetary rewards to the measure they desire. Conducting ongoing research into career fields or having the practicality to attend higher level university training requires a self-disciplined person who can manage their time appropriately or juggle multiple responsibilities to achieve monetary wealth.