Vengeance is the act of punishing or harming sb in return for sth bad thay have done to you, your friend or family, For example : He felt a terrible desire for vengeance on the people who had destroyed his career. The justice is a fair treatment of people ( a struggle of justice), the quality of being fair or reasonable (everybod realized the justice of what he was saying), the law and the way it is used (the criminal justice system).

Answer: "Perspective" - I congratulate you for your excellent insight. It took me years to understand this.