17:3,4 If thy brother shall trespass against thee, rebuke him. See notes on Mt 18:15-22. Observe that kind rebuke, as well as forgiveness, is a duty.
17:4 If he sin against thee seven times in a day, and seven times in a day return, saying, I repent - That is, if he give sufficient proof that he does really repent, after having sinned ever so often, receive him just as if he had never sinned against thee. But this forgiveness is due only to real penitents. In a lower sense we are to forgive all, penitent or impenitent; (so as to bear them the sincerest good will, and to do them all the good we can;) and that not seven times only, but seventy times seven.
17:1-10 It is no abatement of their guilt by whom an offence comes, nor will it lessen their punishment that offences will come. Faith in God's pardoning mercy, will enable us to get over the greatest difficulties in the way of forgiving our brethren. As with God nothing is impossible, so all things are possible to him that can believe. Our Lord showed his disciples their need of deep humility. The Lord has such a property in every creature, as no man can have in another; he cannot be in debt to them for their services, nor do they deserve any return from him.