One of the principles of the cross is about forgiveness and love. God forgave us and so He sent His begotten son to die for the sins of mankind. Nobody can pass through life without been offended. Jesus gave us limitless number of times to forgive anyone. It is seventy times seven. That means continuously, despite the nature of the offense.
Taking vengeance for yourself by the way of unforgiveness will diminish the plan of God for your life and make the cross none effective. This book will help you overcome and minimize issues that may have led to your unforgiveness. Let go the pain and allow God to take control of the situation and fight your battles for you (Exodus 14:14). With God all things are possible. You can do it. Ask for the Grace of God for help. God is on your side and He will help you.