I am able to do relaxation training and this reduces my stress and anger. Is forgiveness, then, unnecessary for me?

Forgiveness is a moral virtue and need not occur only to aid a person in reducing anger. As a moral virtue, you can forgive as an end in and of itself, because it is good. Also, try to be aware of what happens inside you once you are no longer relaxed. Does the anger well up inside you again? If so, then the practice of forgiveness might be a more permanent solution to your anger than relaxation training by itself.

Learn more at Forgiving is not. . .

In some of your books you say that Aristotle is the foundation for your work on forgiveness. Why bother with some old white guy when there are so many people who have discussed moral issues?

So, are you saying that age and skin color should be the primary basis for embracing ideas? Tell me, which other author has defined the concept of moral virtue as or more complexly than Aristotle? He tells that all moral virtues, and that would include what he calls magnanimity of heart (which would include forgiveness), is characterized by at least 7 characteristics: 1) It concerns the good toward others; 2) people are motivated to do the good (affective dimension); 3) people know it is good (the cognitive dimension); 4) the insight translates into behavior that is consistent with the motivation and the cognitive insight (the behavioral dimension); 5) people can strive for perfection of the virtue, but do not reach perfection; 6) there are individual differences among people in the understanding and expression of the virtue; and 7) people strive for consistency in how they express the virtue. Further, he challenges us to see the universal characteristics of each moral virtue (it’s essence) as we express the virtue differently across situations and cultures (it’s existence). And still further, he tells us that each moral virtue has a formal cause (what it is in its essence) and a final cause (each virtue points to certain outcomes). Who is more complete than this? Do you still think these are arbitrary thoughts by “some old white guy”? If so, produce another thinker who is deeper.

For additional information, see Why Forgiveness Is Not Only a Psychological Construct.

Is the gift-giving to an offending other person a way to prove to yourself that you, indeed, have forgiven?

The gift-giving in its essence is not for the forgiver, but instead is for the one forgiven.  Forgiveness as a moral virtue is concerned with goodness and that goodness flows out of the forgiver to the forgiven.  While the gift-giving can be a sign to you that you have forgiven, that is not its primary function.  The primary function is to do good to the other as a moral act in and of itself.

Learn more about what forgiveness is and is not at What Is Forgiveness?