If we transplant Peter's question and the Lord's response from Matthew 18 into the sixth chapter where the theme of forgiveness emerges out of the Lord's prayer, we would have a succinct teaching on prayer, forgiveness, and the reach of forgiveness.
From The Commands by Michael Phillips. Read by Michael Kimball. More information on this and similar writings may be found at Father of the Inklings. Visit Amazon to purchase The Commands and other books by Michael Phillips.