You may not think forgiveness is important but here is a list of the repercussions of Unforgiveness.

Bitterness
Resentment
Spiritual Blockage
Unforgiven by God (Matthew 6:14-15)
Torment (Matthew 18:34-35)
Emotional Bondage
Inner Poison
Broken Relationships
Chronic Anger
Anxiety & Stress
Physical Illness
Hardened Heart
Stunted Growth
Hindered Prayer
Root of Division
Loss of Peace
Vengeful Spirit
Spiritual Captivity
Joylessness
Isolation

Unforgiveness is one of the heaviest burdens a person can carry. The Bible presents it not just as an emotional issue, but as a serious spiritual condition with real consequences.