They recognized the weakness of human nature and realized that the people would go thru many situations in a life span that may cause animosity and hostility. When someone humiliates or insults us, we get antagonistic. Jealousy breeds hate and makes us lose our sense of discrimination. The typical stereo type responses to the above situations are either fast revenge or slow revenge. Fast revenge results into anger, fight and sometimes physical injury on the spot.
Slow revenge is more common in a civilized society.
It takes the form of deep resentment, bitterness and hate and probably more damaging because of the duration involved. The common results of these responses are strained relationships and non productive use of precious life. However, our ego prevents us from realizing this. It is only by practicing all of these can we develop forgivenss. Absolute and total forgiveness is too difficult a goal for us to reach right away.