Catechism of the Council of Trent: "Forgive our trespasses as we forgive those who trespass against us"
Confidence In God's Mercy
But lest the faithful, terrified by the grievousness of their sins, despair of being able to obtain pardon, the pastor ought to encourage them to hope by the following considerations.
As is declared in an Article of the Creed, Christ the Lord has given power to the Church to remit sins.
Furthermore, in this Petition, our Lord has taught how great is the goodness and bounty of God towards mankind; for if God were not ready and prepared to pardon penitents their sins, never would He have prescribed this formula of prayer: Forgive us our trespass. Wherefore we ought to be firmly convinced, that since He commands us in this Petition to implore His paternal mercy, He will not fail to bestow it on us. For this Petition assuredly implies that God is so disposed towards us, as willingly to pardon those who are truly penitent.
God it is against whom, having cast off obedience, we sin; the order of whose wisdom we disturb, as far as in us lies; whom we offend; whom we outrage by words and deeds. But it is also God, our most beneficent Father, who, having it in His power to pardon all transgressions, has not only declared His willingness to do so, but has also obliged men to ask Him for pardon, and has taught in what words they are to do so. To no one, therefore, can it be a matter of doubt, that under His guidance it is in our power to be reconciled to God. And as this declaration of the divine willingness to pardon increases faith, nurtures hope and inflames charity, it will be worth while to amplify this subject, by citing some Scriptural authorities and some examples of penitents to whom God granted pardon of the most grievous crimes. Since, however, in the introduction to the Lord's Prayer and in that portion of the Creed which teaches the forgiveness of sins, we were as diffuse on the subject as circumstances allowed, the pastor will borrow from those places whatever may seem pertinent for instruction on this point, for the rest drawing on the fountains of the Sacred Scriptures.
"Debts"
The pastor should also follow the same plan which we thought should be used in the other Petitions. Let him explain, then, what the word debts here signifies, lest perhaps the faithful, deceived by its ambiguity, pray for something different from what should be prayed for.
First, then, we are to know, that we by no means ask for exemption from the debt we owe to God on so many accounts, the payment of which is essential to salvation, namely, that of loving Him with our whole heart, our whole soul, and our whole mind; neither do we ask to be in future exempt from the duties of obedience, worship, veneration, or any other similar obligation, comprised also under the word debts.
What we do ask is that He may deliver us from sins. This is the interpretation of St. Luke, who, instead of debts, makes use of the word sins, because by their commission we become guilty before God and incur a debt of punishment, which we must pay either by satisfaction or by suffering. It was of this debt that Christ the Lord spoke by the mouth of His Prophet: Then did I pay that which I took not away. From these words of God we may understand that we are not only debtors, but also unequal to the payment of our debt, the sinner being of himself utterly incapable of making satisfaction.
Wherefore we must fly to the mercy of God; and as justice, of which God is most tenacious, is an equal and corresponding attribute to mercy, we must make use of prayer, and the intercession of the Passion of our Lord Jesus Christ, without which no one ever obtained the pardon of his sins, and from which, as from its source, have flown all the efficacy and virtue of satisfaction. For of such value is that price paid by Christ the Lord on the cross, and communicated to us through the Sacraments, received either actually or in purpose and desire, that it obtains and accomplishes for us the pardon of our sins, which is the object of our prayer in this Petition.
Here we ask pardon not only for our venial offences, for which pardon may most easily be obtained, but also for grievous and mortal sins. With regard to grave sins, however, this Petition cannot procure forgiveness unless it derive that efficacy from the Sacrament of Penance, received, as we have already said, either actually or at least in desire.
"Our"
The words our debts are used here in a sense entirely different from that in which we said our bread. That bread is ours, because it is given us by the munificence of God; whereas sins are ours, because with us rests their guilt. They are our voluntary acts, otherwise they would not have the character of sin.
Admitting, therefore, and confessing the guilt of our sins, we implore the clemency of God, which is necessary for their expiation. In this we make use of no palliation whatever, nor do we transfer the blame to others, as did our first parents Adam and Eve. We judge ourselves, employing, if we are wise, the prayer of the Prophet: Incline not my heart to evil words, to make excuses in sins.
"Forgive Us"
Nor do we say, forgive me, but forgive us; because the fraternal relationship and charity which subsist between all men, demand of each of us that, being solicitous for the salvation of all our neighbours, we pray also for them while offering prayers for ourselves.
This manner of praying, taught by Christ the Lord, and subsequently received and always retained by the Church of God, the Apostles most strictly observed themselves and taught others to observe.
Of this ardent zeal and earnestness in praying for the salvation of our neighbours, we have the splendid example of Moses in the Old, and of St. Paul in the New Testament. The former besought God thus: Either forgive them this trespass; or, if thou dost not, strike me out of the book that thou hast written; while the latter prayed after this manner: I wished myself to be anathema from Christ for my brethren.
"As we Forgive our Debtors"
The word as may be understood in two senses. It may be taken as having the force of a comparison, meaning that we beg of God to pardon us our sins, just as we pardon the wrongs and contumelies which we receive from those by whom we have been injured. It may also be understood as denoting a condition, and in this sense Christ the Lord interprets that formula. If, He says, you forgive men their offences, your heavenly Father will also forgive you your offences; but if you will not forgive men, neither will your Father forgive you your sins.
Either sense, however, equally contains the necessity of forgiveness, intimating, as it does that, if we desire that God should grant us the pardon of our offences, we ourselves must pardon those from whom we have received injury; for so rigorously does God exact from us forgetfulness of injuries and mutual affection and love, that He rejects and despises the gifts and sacrifices of those who are not reconciled to one another.
Necessity Of Forgiveness
Even the law of nature requires that we conduct ourselves towards others as we would have them conduct themselves towards us; hence he would be most impudent who would ask of God the pardon of his own offences while he continued to cherish enmity against his neighbour.
Those, therefore, on whom injuries have been inflicted, should be ready and willing to pardon, urged to it as they are by this form of prayer, and by the command of God in St. Luke: If thy brother sin against thee, reprove him; and if he repent, forgive him; and if he sin against thee seven times in a day, and seven times in a day turn again to thee, saying, "I repent," forgive him. In the Gospel of St. Matthew we read: Love your enemies; and the Apostle, and before him Solomon wrote: If thy enemy be hungry, give him to eat; if he thirst, give him to drink; and finally we read in the Gospel of St. Mark: When you shall stand to pray, forgive if you have anything against any man; that your Father also who is in heaven may forgive you your sins.
Reasons For Forgiveness
But since, on account of the corruption of nature, there is nothing to which man brings himself more reluctantly than to the pardon of injuries, let pastors exert all the powers and resources of their minds to change and bend the dispositions of the faithful to this mildness and mercy so necessary to a Christian. Let them dwell on those passages of Scripture in which we hear God commanding to pardon enemies.
Let them also insist on this certain truth, that one of the surest signs that men are children of God is their willingness to forgive injuries and sincerely love their enemies; for in loving our enemies there shines forth in us some likeness to God our Father, who, by the death of His Son, ransomed from everlasting perdition and reconciled to Himself the human race, which before was most unfriendly and hostile to Him.
Let the close of this exhortation and injunction be the command of Christ the Lord, which, without utter disgrace and ruin, we cannot refuse to obey: Pray for them that persecute and calumniate you; that you may be the children of your Father who is in heaven.
This Petition Should Not be Neglected
But in this matter no ordinary prudence is required on the part of the pastor, lest, knowing the difficulty and necessity of this precept, anyone despair of salvation.