Forgiveness by definition is "the releasing of a debt." It is not saying what the other person did was right or OK by any means, it simply is saying they don't owe you for it. Forgiveness is acknowledging that Christ is your source and He more than “repays” whatever debt they incurred to you. In faith you are saying, "If you did not supply me the love you promised me, I do not walk away deficient in love, Christ becomes the love you did not supply me!"