(3b) Ephesians 5:3-14 warn, with even greater fulness and emphasis, against the sins of impurity and lust, as incompatible with membership of the kingdom of heaven, as works of darkness, impossible to those who are children of light.

(3) But fornication, and all uncleanness, or Christian light covetousness.--"Fornication" is closely joined (as in 2Corinthians 12:21; Galatians 5:19; Colossians 3:5) with "uncleanness," of which general sin it is a flagrant species. It is distinguished (as also in Colossians 3:5) from "covetousness," or greediness. "Uncleanness" is a sin against our own body and soul (see 1Corinthians 6:18); "covetousness" (literally, the insatiable desire for more) is a sin against our neighbour. At the same time, the constant connection of the two words suggests the truth which is conveyed by the union of the two kinds of "coveting" in the Tenth Commandment, viz., that the temper of selfish and unbridled concupiscence has a two-fold direction--to the covetousness of lust, and to the covetousness of avarice--the one perhaps especially a vice of youth, and the other of old age.

Verses 3-21. - THE WALK SUITABLE TO THE CHILDREN OF LIGHT. Verse 3. - But. Another of the remarkable contrasts of this Epistle; the fumes of lust are doubly odious in contact with the sweet savor of Christ's offering. Fornication and all impurity, or covetousness. The combination of covetousness with sins of the flesh, occurring several times in the apostle's writings (1 Corinthians 5:11; Ephesians 5:3; Colossians 3:5), is rather unexpected. Πλεονεξία, covetousness, means the desire of having more, which is peculiarly true of sensual sins; but it is not coupled with them by a καὶ, but disjoined by an η}, indicating something of another class. In the mind of the apostle, sensuality was inseparable from greed, unnatural craving for more, dissatisfaction with what was enough; hence the neighborhood of the two vices. Let it not be even named among you, as becometh saints. The practice of such sins was out of the question; but even speaking of them, as matters of ordinary conversation, was unsuitable for saints; the very conversation of Christians must be pure. The exhortation bears on Christians in their social relations; had the apostle been treating of the duty of the individual, he would have urged that such sins should never be admitted even to the thoughts or the imagination.

5:3-14 Filthy lusts must be rooted out. These sins must be dreaded and detested. Here are not only cautions against gross acts of sin, but against what some may make light of. But these things are so far from being profitable. that they pollute and poison the hearers. Our cheerfulness should show itself as becomes Christians, in what may tend to God's glory. A covetous man makes a god of his money; places that hope, confidence, and delight, in worldly good, which should be in God only. Those who allow themselves, either in the lusts of the flesh or the love of the world, belong not to the kingdom of grace, nor shall they come to the kingdom of glory. When the vilest transgressors repent and believe the gospel, they become children of obedience, from whom God's wrath is turned away. Dare we make light of that which brings down the wrath of God? Sinners, like men in the dark, are going they know not whither, and doing they know not what. But the grace of God wrought a mighty change in the souls of many. Walk as children of light, as having knowledge and holiness. These works of darkness are unfruitful, whatever profit they may boast; for they end in the destruction of the impenitent sinner. There are many ways of abetting, or taking part in the sins of others; by commendation, counsel, consent, or concealment. And if we share with others in their sins, we must expect to share in their plagues. If we do not reprove the sins of others, we have fellowship with them. A good man will be ashamed to speak of what many wicked men are not ashamed to do. We must have not only a sight and a knowledge that sin is sin, and in some measure shameful, but see it as a breach of God's holy law. After the example of prophets and apostles, we should call on those asleep and dead in sin, to awake and arise, that Christ may give them light.But fornication, and all uncleanness, or covetousness,.... The apostle proceeds to dehort from several vices, which are unbecoming the dear children and followers of God; and which the love of Christ should constrain them to avoid: the first of these, which is simple "fornication", is the sin which is committed between single or unmarried persons; and is contrary to the law of God, is a work of the flesh, and is against a man's own body; it renders persons unfit for church communion, brings many temporal calamities upon them, and exposes them to divine wrath, and excludes from the kingdom of heaven, without repentance; and the reason why it is so often taken notice of is, because it was very frequent among the Gentiles, and not thought criminal: "all uncleanness" takes in adultery, incest, sodomy, and every unnatural lust; and "covetousness" seems not so much to design that sin which is commonly so called, namely, an immoderate desire after worldly things, as a greedy and insatiable appetite after the above lusts:

let it not be once named among you, as becometh saints; that is, neither one or other of them; the sense is, that they should not be committed; so that there might be no occasion to speak of them, even though with abhorrence, as if there were no such vices in being; and much less should they be named with pleasure, and pleaded for: for thus it becomes such who are set apart by God the Father, whose sins are expiated by the blood of Christ, and whose hearts are sanctified by the Spirit of God; who profess the Gospel of Christ, and have a place and a name in God's house, better than that of sons and daughters.