What is forgiveness? How do you know when you have truly forgiven someone?

I think that you've truly forgiven someone when you think of them and feel nothing but love or acceptance. Perhaps you might even wish for them to be happy. When you look upon your past or relive those terrible experiences, a hot mixture of deep pain, regret, and a jumble of other emotions might surge through your chest, but hatred should not be found in your heart. You should be able to move on through your life without allowing the heavy burdens of the past to chain your limbs. This person should not be a constant, dark presence thrumming in your mind. Instead, they should be a fleeting thought, flickering here and there but never overwhelming your head. There might be days when memories of them flood through your body, but as you look upon them, there should not be animosity or a dark need for vengeance boiling in your veins.