The price of refusing to forgive is high. Unforgiveness produces hatred, bitterness, animosity, anger, and retribution. It not only clogs up the arteries but also the courts with thousands of vengeful lawsuits. Refusing to forgive imprisons people in their past. Unforgiving people keep their pain alive by constantly picking at the open wounds and keeping it from healing. Bitterness takes root in their hearts and defiles them (Heb. 12:15). Anger rages out of control and negative emotions run unchecked. Life is filled with turmoil and strife instead of joy and peace.
John MacArthur