God requires us to forgive others in order to be forgiven by Him. We are all human and we will make mistakes. If we want to be blessed by God then we need to be merciful to others just as God is merciful toward us. God wants us to replace our heart of stone with a heart of flesh. The humility, love, joy, peace, gentleness, meekness, kindness, patience, faithfulness & self control that comes from God, through His Holy Spirit in operation within us, is what allows us to operate in forgiveness & be blessed. Do not reject the blessings of God through refusing to forgive others.