The sense of duty and your enthusiasm for it is essential. Discipline is the faculty of obeying the call of duty, and overcoming outbursts of intense emotions. In order to rule your emotions you need to cultivate the habit of reflection, to get used to thinking before acting in any circumstances. Only the regular practice of discipline will allow you to be as objective toward yourself as you usually are with others. This is the basis upon which you must found every effort to built up your character.
The raw material for improving your personality can be only the man/woman you are in fact, and not the man/woman you innocently or ignorantly imagine you are.
AFFIRMATIVE NEGATIVE