No matter how good a life that you live, if you hate your brother, you will always abide in death. The worse thing that can happen is when a man harbors hate that is unforgiven and that man becomes bitter. (Matthew 6:14-15) tells us that forgiveness is a serious matter. "For if we forgive men their trespasses, your heavenly Father will also forgive you: But if you forgive not men their trespasses, neither will your father forgive your trespasses."