In the passage before us the Apostle contrasts our sanctification with the cardinal vice of heathenism, impurity. Above all other sins, this was characteristic of the Gentiles _who knew not God_. There is something striking in that description of the pagan world in this connection: ignorance of God was at once the cause and the effect of their vileness; had they retained God in their knowledge, they could never have sunk to such depths of shame; had they shrunk from pollution with instinctive horror, they would never have been abandoned to such ignorance of God. No one who is not familiar with ancient literature can have the faintest idea of the depth and breadth of the corruption. Not only in writers avowedly immoral, but in the most magnificent works of a genius as lofty and pure as Plato, there are pages that would stun with horror the most hardened profligate in Christendom. It is hardly an exaggeration to say that on the whole matter in question the heathen world was without conscience: it had sinned away its sense of the difference between right and wrong; to use the words of the Apostle in another passage, being past feeling men had given themselves up to work all manner of uncleanness. They gloried in their shame. Frequently, in his epistles, Paul combines this vice with covetousness,--the two together representing the great interests of life to the ungodly, the flesh and the world. Those who do not know God and live for Him, live, as he saw with fearful plainness, to indulge the flesh and to heap up gain. Some think that in the passage before us this combination is made, and that ver. 6--"that no man go beyond and defraud his brother in _any_ matter"--is a prohibition of dishonesty in business; but that is almost certainly[13] a mistake. As the Revised Version shows, the Apostle is speaking of the matter in hand; in the Church especially, among brethren in Christ, in the Christian home, the uncleanness of heathenism can have no place. Marriage is to be sanctified. Every Christian, marrying in the Lord, is to exhibit in his home-life the Christian law of sanctification and noble self-respect.
The Apostle adds to his warning against sensuality the terrible sanction, "The Lord is an avenger in all these things." The want of conscience in the heathen world generated a vast indifference on this point. If impurity was a sin, it was certainly not a crime. The laws did not interfere with it; public opinion was at best neutral; the unclean person might presume upon impunity. To a certain extent this is the case still. The laws are silent, and treat the deepest guilt as a civil offence. Public opinion is indeed stronger and more hostile than it once was, for the leaven of Christ's kingdom is actively at work in society; but public opinion can only touch open and notorious offenders, those who have been guilty of scandal as well as of sin; and secrecy is still tempted to count upon impunity. But here we are solemnly warned that the Divine law of purity has sanctions of its own above any cognisance taken of offences by man. "The Lord is an avenger in all these things." "Because of these things cometh the wrath of God upon the sons of disobedience."
Is it not true? They are avenged on the bodies of the sinful. "Whatsoever a man soweth, that shall he also reap." The holy law of God, wrought into the very constitution of our bodies, takes care that we do not violate it without paying the penalty. If it is not at the moment, it is in the future, and with interest,--in premature old age; in the torpor which succeeds all spendthrift feats, excesses of man's prime; in the sudden break-down under any strain put on either physical or moral courage. They are avenged in the soul. Sensual indulgence extinguishes the capacity for feeling: the profligate man would love, but cannot; all that is inspiring, elevating, redeeming in the passions is lost to him; all that remains is the dull sense of that incalculable loss. Were there ever sadder lines written than those in which Burns, with his life ruined by this very thing, writes to a young friend and warns him against it?