For it is a fire that consumeth to destruction - This may mean that such an offence would be a crime that would provoke God to send destruction, like a consuming fire upon the offender (Rosenmuller and Noyes), or more likely it is designed to be descriptive of the nature of the sin itself. According to this, the meaning is, that indulgence in this sin tends wholly to ruin and destroy a man. It is like a consuming fire, which sweeps away everything before it. It is destructive to the body, the morals, the soul. Accordingly, it may be remarked that there is no one vice which pours such desolation through the soul as licentiousness. See Rush on the Diseases of the Mind. It corrupts and taints all the fountains of morals, and utterly annihilates all purity of the heart. An intelligent gentleman, and a careful observer of the state of things in society, once remarked to me, that on coming to the city of Philadelphia, it was his fortune to be in the same boarding-house with a number of young men, nearly all of whom were known to him to be of licentious habits. He has lived to watch their course of life; and he remarked, that there was not one of them who did not ultimately show that he was essentially corrupt and unprincipled in every department of morals. There is not any one propensity of man that spreads such a withering influence over the soul as this; and, however it may be accounted for, it is certain that indulgence in this vice is a certain evidence that the whole soul is corrupt, and that no reliance is to be placed on the man's virtue in any respect, or in reference to any relation of life.

And would root out all mine increase - By its desolating effects on my heart and life. The meaning is, that it would utterly ruin him; compare Luke 15:13, Luke 15:30. How many a wretched sensualist can bear testimony to the truth of this statement! How many a young man has been wholly ruined in reference to his worldly interests, as well as in reference to his soul, by this vice compare Proverbs 7:No young man could do a better service to himself than to commit the whole of that chapter to memory, and so engrave it on his soul that it never could be forgotten.

For it is a fire - Nothing is so destructive of domestic peace. Where jealousy exists, unmixed misery dwells; and the adulterer and fornicator waste their substance on the unlawful objects of their impure affections.

For it is a fire that consumeth to destruction,.... Referring either to the nature of the sin of uncleanness; it is inflammatory, a burning lust, a fire burning in the breast; see 1 Corinthians 7:9; or to the effect of it, either the rage of jealousy in the injured person, which is exceeding fierce, furious, and cruel, like devouring fire, not to be appeased or mitigated, Proverbs 6:34; or else it may respect the punishment of this sin in the times of Job, and which we find was practised among the Gentiles, as the Canaanites, Job's neighbours, burning such delinquents with fire; see Genesis 38:24; or rather the wrath of God for it, which is poured forth as fire, and burns to the lowest hell, and into which lake of fire all such impure persons will be cast, unless the grace of God prevents; and which will be a fire that will consume and destroy both soul and body, and so be an utter and everlasting destruction, Revelation 21:8;

and would root out all my increase; even in this world; adultery is a sin that not only ruins a man's character, fixes an indelible blot upon him, a reproach that shall not be wiped off, and consumes a man's body, and destroys the health of it, but his substance also, the increase of his fields, and of his fruits, and by means of it a man is brought to a piece of bread, to beg it, and to be glad of it, Proverbs 6:26.

For it is a fire that consumeth {h} to destruction, and would root out all mine increase.

(h) He shows that although man neglects the punishment of adultery, yet the wrath of God will never cease till such are destroyed.

31:12 Destruction - Lust is a fire in the soul; it consumes all that is good there, the convictions, the comforts; and lays the conscience waste. It consumes the body, consumes the substance, roots out all the increase. It kindles the fire of God's wrath, which if not quenched by the blood of Christ, will burn to the lowest hell.

12. (Pr 6:27-35; 8:6-23, 26, 27). No crime more provokes God to send destruction as a consuming fire; none so desolates the soul.

31:9-15 All the defilements of the life come from a deceived heart. Lust is a fire in the soul: those that indulge it, are said to burn. It consumes all that is good there, and lays the conscience waste. It kindles the fire of God's wrath, which, if not quenched by the blood of Christ, will consume even to eternal destruction. It consumes the body; it consumes the substance. Burning lusts bring burning judgments. Job had a numerous household, and he managed it well. He considered that he had a Master in heaven; and as we are undone if God should be severe with us, we ought to be mild and gentle towards all with whom we have to do.