The Pulpit Commentary - Matthew 18:21-35
The limits of mercy. Peter's question here was suggested by his Lord's doctrine concerning Christian judgment ( Matthew 18:15-20 ). "Then came Peter," etc. The form of Peter's question may have been suggested by the custom of the rabbins who from Amos 1:3 —"For three transgressions, and for four, I will not turn away wrath"—held that three offences were to be forgiven, and not the fourth; or, uniting the two numbers, made "seven times" the extreme limit of their forgiveness. The Lord's... read more
The Pulpit Commentary - Matthew 18:21-35
The unmerciful servant. The form of Peter's question shows that he still considered that to forgive was not the law of the kingdom, but a tentative measure which might at any moment be revoked, that underneath the forgiveness there lies the right to revenge. We also know this feeling of Peter's, that in forgiving we are doing something more than could be demanded of us. And this feeling, wherever it exists, shows that we are living with retaliation for the law, forgiveness for the exception.... read more