Forgiveness, like Appreciation and Gratitude, is a Powerful attribute to have. The opposite of Forgiveness is Resentment.
Resentment robs us of our strength, weakens our Integrity, and limits our perception.
"Anger is a wind which blows out the lamp of the mind"
Robert Green Ingersoll
Not allowing ourselves to forgive keeps us stuck in the past. It creates Resentment, which never fixes or solves anything, and will ultimately result in only hurting ourselves.
Forgiveness is not letting someone "off the hook"; it is the opposite. Forgiving someone is actually holding them accountable. By forgiving we are making a statement that we are in control of our Power.
There are also times when we need to Forgive ourselves. Forgiving ourselves is an act of Learning: Growing and Letting go of the past to Empower us for our Future.
Forgiveness allows us to move forward. Forgiveness gives us Strength, builds our Integrity, and gives us the Wisdom to see Unlimited Possibilities... allowing ourselves to Be in and Stay in Full Control.