Matthew 18:
28 “But when that servant went out, he found one of his fellow servants who owed him a hundred silver coins. He grabbed him and began to choke him. 

‘Pay back what you owe me!’ he demanded.
29 “His fellow servant fell to his knees and begged him, ‘Be patient with me, and I will pay it back.’
30 “But he refused. Instead, he went off and had the man thrown into prison until he could pay the debt. 31 When the other servants saw what had happened, they were outraged and went and told their master everything that had happened.

The one who was shown an unthinkable mercy did not let it change his view of others. The amount was very small by comparison to what he had owed, but enough to drive the man to see red with the one who owed him.

Forgiveness and mercy can sometimes leave you feeling unsettled… even though the account has been balanced. Did the one forgiven the greater amount somehow think that his debtor should pay up since it was a doable amount? His own debt was cancelled because it was impossible. If his debt were this small, would he not have paid it off?

His own debt was this small at one time and he did nothing when he could have worked it off. Now he expects more of another man than he did for himself. We sometimes are harder on those who have made smaller mistakes.

Or did he think that he needed the small sum in order to go back and still try to pay the King off for his ridiculous debt? We are offended when people who are forgiven much lack mercy on others. The other servants ratted him out to the King.

Instead, the forgiven man should have let the mercy change his evaluation of others. Mercy should beget mercy.

Richard Foster said,

Once we see the awfulness of sin we know that, regardless of what others have done, we ourselves are the chief of sinners. Therefore, there is nothing that anyone can say that will disturb us. Nothing. By living under the cross we can hear the worst possible things from the best possible people without so much as batting an eyelash. If we live in that reality, we will convey that spirit to others. They know it is safe to come to us. They know we can receive anything they could possibly reveal. They know we will never condescend to them but, instead, understand.[1]

[1] Richard Foster, Celebration Of Discipline, Perfectbound, p.154