Matthew 18:21

St. Peter knew the Jews to be much given to revenge; he therefore thought it a great proof of superior virtue to be able to forgive seven times. It was for this reason he proposed this question to our Lord; who, to shew how much he esteemed charity, immediately answered, not only seven times, but seventy times seven times. He does not mean to say that this number must be the bounds of our forgiving; we must forgive to the end, and never take revenge, however often our brother offend against us. There must be no end of forgiving poor culprits that sincerely repent, either in the sacrament of penance, or one man another his offences. (Bristow) --- To recommend this great virtue more forcibly, he subjoins the parable of the king taking his accounts: and, for the great severity there exercised, he intimates how rigid will his heavenly Father be to those who forgive not their enemies. (Denis the Carthusian)