Matthew Henry's Concise Commentary4:29-32 Filthy words proceed from corruption in the speaker, and they corrupt the minds and manners of those who hear them: Christians should beware of all such discourse. It is the duty of Christians to seek, by the blessing of God, to bring persons to think seriously, and to encourage and warn believers by their conversation. Be ye kind one to another. This sets forth the principle of love in the heart, and the outward expression of it, in a humble, courteous behaviour. Mark how God's forgiveness causes us to forgive. God forgives us, though we had no cause to sin against him. We must forgive, as he has forgiven us. All lying, and corrupt communications, that stir up evil desires and lusts, grieve the Spirit of God. Corrupt passions of bitterness, wrath, anger, clamour, evil-speaking, and malice, grieve the Holy Spirit. Provoke not the holy, blessed Spirit of God to withdraw his presence and his gracious influences. The body will be redeemed from the power of the grave at the resurrection day. Wherever that blessed Spirit dwells as a Sanctifier, he is the earnest of all the joys and glories of that redemption day; and we should be undone, should God take away his Holy Spirit from us.Barnes' Notes on the BibleAnd be ye kind one to another - Benignant, mild, courteous, "polite" - χρηστοὶ chrēstoi. 1 Peter 3:8. Christianity produces true courteousness, or politeness. It does not make one rough, crabby, or sour; nor does it dispose its followers to violate the proper rules of social contact. The secret of true politeness is "benevolence," or a desire to make others happy; and a Christian should be the most polite of people. There is no religion in a sour, misanthropic temper; none in rudeness, stiffness, and repulsiveness; none in violating the rules of good breeding. There is a hollow-hearted politeness, indeed, which the Christian is not to aim at or copy. His politeness is to be based on "kindness;" Colossians 3:12. His courtesy is to be the result of love, good-will, and a desire of the happiness of all others; and this will prompt to the kind of conduct that will render his conversation. with others agreeable and profitable.

Tender-hearted - Having a heart disposed to pity and compassion, and especially disposed to show kindness to the faults of erring brethren; for so the connection demands.

Forgiving one another - see the notes on Matthew 6:12.

As God for Christ's sake hath forgiven you - As God, on account of what Christ has suffered and done, has pardoned you. He has done it:

(1) "freely" - without merit on your part - when we were confessedly in the wrong.

(2) "fully;" he has forgiven "every" offence.

(3) "Liberally;" he has forgiven "many" offences, for our sins have been innumerable.

This is to be the rule which we are to observe in forgiving others. We are to do it "freely, fully, liberally." The forgiveness is to be entire, cordial, constant. We are not to "rake up" old offences, and charge them again upon them; we are to treat them as though they had not offended, for so God treats us Learn:

(1) That the forgiveness of an offending brother is a duty which we are not at liberty to neglect.

(2) the peace and happiness of the church depend on it. All are liable to offend their brethren, as all are liable to offend God; all need forgiveness of one another, as we all need it of God.

(3) there is no danger of carrying it too far. Let the rule be observed, "As God has forgiven you, so do you forgive others." Let a man recollect his own sins and follies; let him look over his life, and see how often he has offended God; let him remember that all has been forgiven; and then, fresh with this feeling, let him go and meet an offending brother, and say, "My brother, I forgive you. I do it frankly, fully, wholly. So Christ has forgiven me; so I forgive you. The offence shall be no more remembered. It shall not be referred to in our contact to harrow up your feelings; it shall not diminish my love for you; it shall not prevent my uniting with you in doing good. Christ treats me, a poor sinner, as a friend; and so I will treat you."

even as—God hath shown Himself "kind, tender-hearted, and forgiving to you"; it is but just that you in turn shall be so to your fellow men, who have not erred against you in the degree that you have erred against God (Mt 18:33).

God for Christ's sake—rather as Greek, "God in Christ" (2Co 5:19). It is in Christ that God vouchsafes forgiveness to us. It cost God the death of His Son, as man, to forgive us. It costs us nothing to forgive our fellow man.

hath forgiven—rather as Greek, "forgave you." God has, once for all, forgiven sin in Christ, as a past historical fact.

tender hearted: which is opposed to a being hard hearted to them that are in distress, and close at hand to the needy; to cruelty and severity to such who are subject to them, or have injured them; and to a rigid and censorious spirit to them that are fallen:

forgiving one another, even as God for Christ's sake hath forgiven you; whatever offences are given, or injuries done by the saints one to another, and so far as they are committed against them, they should forgive, and should pray to God for one another, that he would manifest his forgiveness of them, as committed against him; and this should be done in like manner as God forgives in Christ, and for his sake; that is, fully and freely, and from their hearts; and so as to forget the offences, and not to upbraid them with them hereafter; yea, they should forgive them before they repent, and without asking for it, and that for Christ's sake, and because they are members of his: the Complutensian edition reads, "even as Christ hath forgiven us": the Arabic version also reads us, and so some copies: the words may be rendered, "giving freely to one another, even as God in Christ has given freely to you"; saints should give freely to one another, for outward support, where it is needful; and should impart spiritual gifts and experience for inward comfort, where it is wanted, and as they have ability; and that from this consideration, that all they have, whether in temporals or spirituals, is freely given by God in Christ, and for his sake; with whom he freely gives them all things; in whom he has given them grace, and blessed them with all spiritual blessings; as peace, pardon, righteousness, and eternal life.

(19) An argument taken from the example of Christ, most grave and strong, both for the pardoning of those injuries which have been done to us by our greatest enemies, and much more for having consideration of the miserable, and using moderation and gentle behaviour towards all men.