Maybe you were assaulted, robbed, or in a car accident. Or, perhaps the victimization took place at home or while growing up. Being victimized is painful. It may not match the pain we inflict upon ourselves when we harbor anger and resentment for the person who wronged us.
Some people eventually free themselves from the pain.
Others remain stuck, wallowing in sadness, anger, guilt and any number of emotions that interfere with their potential. Forgiving isn't easy, as evidenced by the volumes of books on the topic. But, it's necessary to maintaining good health. Long-standing resentment can cause numerous physical and emotional problems. Forgiving is good medicine for the spirit.