Forgetting offences is a sign of sincere repentance. If you keep the memory of them, you may believe you have repented but you are like someone running in his sleep. Let no one consider it a minor defect, this darkness that often clouds the eyes even of spiritual people.
Remembrance of Jesus' passion will heal your soul of resentment, by making it ashamed of itself when it remembers the patience of the Lord. Some people have wearied themselves and suffered for a long time in order to extract forgiveness. By far the best course, however, is to forget the offences, since the Lord says: "Forgive at once and you will be forgiven in generous measure." (cf. Luke 6:37-38)
Do not stop praying as long as, by God's grace, the fire and the water have not been exhausted, for it may happen that never again in your whole life will you have such a chance to ask for the forgiveness for your sins.