I Peter 4:8

Have fervent charity - Αγαπην εκτενη· Intense love; for love shall cover a multitude of sins. A loving disposition leads us to pass by the faults of others, to forgive offenses against ourselves, and to excuse and lessen, as far as is consistent with truth, the transgressions of men. It does not mean that our love to others will induce God to pardon our offenses. See the note on Jam 5:20.

above all things--not that "charity" or love is placed above "prayer," but because love is the animating spirit, without which all other duties are dead. Translate as Greek, "Having your mutual (literally, 'towards yourselves') charity intense." He presupposes its existence among them; he urges them to make it more fervent. charity shall cover the multitude, &c.--The oldest manuscripts have "covereth." Quoted from Pro 10:12; compare Pro 17:9. "Covereth" so as not harshly to condemn or expose faults; but forbearingly to bear the other's burdens, forgiving and forgetting past offenses. Perhaps the additional idea is included, By prayer for them, love tries to have them covered by God; and so being the instrument of converting the sinner from his error, "covereth a (not 'the,' as English Version) multitude of sins"; but the former idea from Proverbs is the prominent one. It is not, as Rome teaches, "covereth" his own sins; for then the Greek middle voice would be used; and Pro 10:12; Pro 17:9 support the Protestant view. "As God with His love covers my sins if I believe, so must I also cover the sins of my neighbor" [LUTHER]. Compare the conduct of Shem and Japheth to Noah (Gen 9:23), in contrast to Ham's exposure of his father's shame. We ought to cover others' sins only where love itself does not require the contrary.

And above all things have fervent charity among yourselves,.... Not but that charity, or love, is to be exercised towards all men, even towards enemies, but more especially towards the saints, and that under such a consideration in which it cannot be exercised towards others; namely, as their brethren in Christ, and as belonging to him, as the children of God, as redeemed by Christ, and sanctified by the Spirit; and these not only such as are of the same nation, and belong to the same particular church and community, or of the same denomination, but all the saints everywhere, whether Jews or Gentiles, or of whatsoever name, and in whatsoever state and condition: and this love ought to be mutual and reciprocal, and to be warm and fervent, and not lukewarm and indifferent, as it too often is; and should be constant, "continued", and "perpetual", as the Vulgate Latin and Arabic versions here read: and this the apostle exhorts to above all things else; since outward sobriety, and watchings, and prayer, and all other duties, are nothing without this; this is the sum and substance of the law, and the fulfilling of it; and without this a mere knowledge of the Gospel, and a profession of it, are in vain, and therefore in the first place to be attended to. And especially for the following reason, for charity shall cover the multitude of sins; referring to Pro 10:12 not a man's own sins, but the sins of others; and not from the sight of God, for from that only the blood and righteousness of Christ cover sins, even all the sins, the whole multitude of the sins of God's elect; but from the sight of men, both of those against whom they are committed, and others; since charity, or true love, thinks no ill, but puts the best constructions upon the words and actions of fellow Christian…

The work of a Christian is twofold - doing the will of God and suffering his pleasure. This chapter directs us in both. The duties we are here exhorted to employ ourselves in are the mortification of sin, living to God, sobriety, prayer, charity, hospitality, and the best improvement of our talents, which the apostle presses upon Christians from the consideration of the time they have lost in their sins, and the approaching end of all things (Pe1 4:1-11). The directions for sufferings are that we should not be surprised at them, but rejoice in them, only take care not to suffer as evil-doers. He intimates that their trials were near at hand, that their souls were in danger as well as their bodies, and that the best way to preserve their souls is to commit them to God in well-doing.

4:8 By its nature, love overlooks sins committed against us by others (see Prov 10:12; Matt 18:21-22; 1 Cor 13:4-7). Peter might also mean that our attitude of love, because it displays our relationship with Christ, covers our own sins and causes them to be forgiven (see Luke 7:47).