Reconciliation

The Sacrament of Reconciliation brings about a change of heart through God's mercy and forgiveness.
It is a sacrament instituted by Jesus Christ in His love and mercy to offer sinners forgiveness.
"And all this is from God, who has reconciled us to himself through Christ and given us the ministry of reconciliation," - 2 Corinthians 5:18

Link to a variety of examinations of conscience:  Click HERE