Most people do not realize it, but unforgiveness can do a number on your health and eventually kill you graveyard dead. You could not pay me to hold unforgiveness in my heart against another person. There is no amount of money that can entice me to do that. I learned long ago to forgive and forget. Vengeance belongs to the Lord, and He will repay.
I have had any number of wrongs done to me over the years. I've been talked about, lied on, written about in books and criticized on radio and TV broadcasts. I've been called everything but a child of God, but I have better sense than to let these attacks get me to a point where I stop loving and stop forgiving. I cannot have a better track record than Jesus, and they talked about Jesus, lied to Him, and eventually crucified Him. But He loved them still.
Unforgiveness will stop your faith in its tracks. If you're standing for healing but have unforgiveness in your heart, you're wasting your time confessing the Word. You might as well be a babbling brook or a clanging cymbal. You're just making noise. It might be pleasant noise, but it's just noise all the same. God cannot forgive you if you don't forgive others. He cannot heal you if you don't forgive.