By forgiving someone for his ill treatment, one awakens in him a sense of shame. Whereas by returning evil for evil, a reaction of revenge and retaliation is produced.
Generally people just take matters at their face value and rush into them without thinking. A person should study matters carefully from every angle before deciding on a course of action.
In a society where mutual trust exists, there is no discord and dissension; there is an atmosphere of confidence as there is no fear of promises being broken.
The successful person is one who keeps his balance and composure whether gaining or losing. Neither experience should make him deviate from the path of moderation.