Let the past go! When you hold a grudge it hurts you more than they who you hold it against.
Grudges, or carrying ill will towards others are an anathema to all true believers. Perhaps the aptest quotation on the matter that sums this up is “grudges are like swallowing poison and hoping your enemy dies from it”. For harboring such feelings towards one’s neighbors, one ultimately only injures oneself in the long term, and it would be better rather, in following in Christ’s example to pray for forgiveness or turn the other cheek towards one’s enemies. In this way, we show true courage and compassion, in a manner that pleases The Lord.
Therefore, if anyone is in Christ, the new creation has come: The old has gone, the new is here!
And we pray:
LORD God, Heavenly Father, my Creator, my beginning and my end, my ALL. I pray for the strength in the face of adversities. Let me not begrudge or despise my neighbors for any wrongs they may have committed, but help me forgive them and show compassion. For I know he who shows mercy, is one who pleases Your Essence, my Lord, for You are Love, Amen. Let me forget past transgressions and help me heal, Lord. For You are my guide in all things, Amen.
I have come to believe that humility is the doorway to God, while arrogance or excessive pride is a trap door through which we fall away from God! As is often visualized, Satan fell from Heaven to Hell because of his innate pride.