They lived only to imagine ways to punish these people who had wronged them. But they were really only punishing themselves. Prompted by gratitude the forgiven sinner must always yearn to forgive whoever has trespassed against him. We can also draw several other lessons from this parable. We are all God's debtors.
None are able to pay what is owed.
But by Christ's atoning sacrifice, the debt is paid. Even as the Son of man came not to be ministered unto, but to minister, and to give his life a ransom for many. Only those who are willing to forgive others can be assured that they are indeed forgiven. Perhaps the most important point we learn from this parable is that the kingdom of heaven is to consist of people who are both forgiven and forgiving, who have both received mercy and are merciful. The first thing we need to do is focus on God's forgiveness of us.