Unforgiveness is a harmful sin with serious consequences both for oneself and oneβs relationship with God and others. It can lead to bitterness, hinder Spiritual growth, and damage relationships. 1Hinder Spiritual growth- can create a barrier between an individual and God. A chain that needs to be broken. 2Damage relationships - can lead to resentment, anger, and bitterness and distance between people. 3 Loss of Joy and Health- loss of joy and can impact your health. 4 Rejection of God foregiveness- those who do not forgive others will not be forgiven by God.