If you develop a pure and sincere motivation, if you are motivated by a wish to help on the basis of kindness, compassion, and respect, then you can carry on any kind of work, in any field, and function more effectively.
If we develop concern for other people’s welfare, share other people’s suffering, and help them, ultimately we will benefit. If we think only of ourselves and forget about others, ultimately we will lose. The more we care for the happiness of others, the greater our own sense of well-being becomes.
At one level, forgiveness means you shouldn’t develop feelings of revenge. Revenge harms the other person, it is a form of violence and usually leads to counterviolence – so the problem never goes away. At another level, forgiveness means you should try not to develop feelings of anger toward your enemy. Anger doesn’t solve the problem, it brings uncomfortable feelings to yourself and destroys your own peace of mind.