Wo unto them that draw iniquity with cords of vanity! After having inserted a short consolation for the purpose of allaying the bitterness of punishments as regards the godly, he returns to threatenings, and proceeds to launch those thunderbolts of words which are fitted to awaken some degree of alarm. By cords he means nothing else than the allurements by which men suffer themselves to be deceived, and harden their heart in crimes; for either they ridicule the judgment of God, or they contrive vain excuses, and allege the plea of necessity. Any concealment, therefore, which they employ, he calls cords; for whenever men are prompted to sin by the lust of the flesh, they at first pause, and feel that something within restrains them, which would certainly keep them back, if they did not rush forward with opposing violence, and break through all opposition. When any man is tempted to do what is sinful, his conscience secretly asks him, What are you doing? And sin never advances so freely as not to feel this check; for God intended in this manner to provide for the good of mankind, lest all should break out into unbridled licentiousness. How comes it, then, that men are so obstinate in doing what is sinful? Assuredly they permit themselves to be deceived by allurements, and stupify their minds, that they may despise the judgment of God, and may thus have some freedom to commit sin. They flatter themselves by imagining that what is sin is not sin, or by some excuse or idle pretense they lessen its enormity. These, then, are cords, wicked ropes, by which they draw iniquity. Hence it is evident that the Lord has good reason for threatening them; for they sin, not only of their own accord, but perversely and obstinately, and, in short, they bind themselves to sin, so that they are without excuse.

Wo unto them - This is a new denunciation. It introduces another form of sin, and threatens its appropriate punishment.
That draw iniquity with cords of vanity - The general idea in this verse and the next, is, doubtless, that of plunging deeper and deeper into sin. The word "sin" here, has been sometimes supposed to mean "the punishment" for sin. The word has that meaning sometimes, but it seems here to be taken in its usual sense. The word "cords" means strings of any kind, larger or smaller; and the expression "cords of vanity," is supposed to mean "small, slender, feeble" strings, like the web of a spider. The word vanity שׁוא shâv', May, perhaps, have the sense here of falsehood or deceit; and the cords of deceit may denote the schemes of evil, the plans for deceiving people, or of bringing them into a snare, as the fowler springs his deceitful snare upon the unsuspecting bird. The Chaldee translates it, 'Woe to those who begin to sin by little and little, drawing sin by cords of vanity; these sins grow and increase until they are strong, and are like a cart-rope.' The Septuagint renders it, 'Woe to those who draw sin with a long cable;' that is," one sin is added to another, until it comes to an enormous length, and the whole is drawn along together. Probably the true idea is that of the ancient interpretation of the rabbis, 'An evil inclination is at first like a fine hair string, but the finishing like a cart-rope.' At first, they draw sin with a slender cord, then they go on to greater deeds of iniquity that urge them on, and draw them with their main strength, as with a cart-rope. They make a strong "effort" to commit iniquity.

With a cart-rope "As a long cable" - The Septuagint, Aquila, Sym., and Theod., for בחבלי bechabley, read כחבלי kechahley, ὡς σχοινιῳ, or σχοινιοις; and the Septuagint, instead of שוא shau, read some other word signifying long; ὡς σχοινιῳ μακρῳ; and so likewise the Syriac, אריכא arecha. Houbigant conjectures that the word which the Septuagint had in their copies was שרוע sarua, which is used Leviticus 21:18, Leviticus 22:23, for something in an animal body superfluous, lengthened beyond its natural measure. And he explains it of sin added to sin, and one sin drawing on another, till the whole comes to an enormous length and magnitude; compared to the work of a rope-maker still increasing and lengthening his rope, with the continued addition of new materials. "Eos propheta similes facit homini restiario, qui funem torquet, cannabe addita et contorta, eadem iterans, donec funem in longum duxerit, neque eum liceat protrahi longius." "An evil inclination," says Kimchi on this place, from the ancient rabbins, "is at the beginning like a fine hair-string, but at the finishing like a thick cart-rope." By a long progression in iniquity, and a continued accumulation of sin, men arrive at length to the highest degree of wickedness; bidding open defiance to God, and scoffing at his threatened judgments, as it is finely expressed in the next verse. The Chaldee paraphrast explains it in the same manner, of wickedness increasing from small beginnings, till it arrives to a great magnitude. - L.
I believe neither the rabbins nor Bishop Lowth have hit on the true meaning of this place, the prophet seems to refer to idol sacrifices. The victims they offered were splendidly decked out for the sacrifice. Their horns and hoofs were often gilded, and their heads dressed out with fillets and garlands. The cords of vanity may refer to the silken strings by which they were led to the altar, some of which were unusually thick. The offering for iniquity was adorned with fillets and garlands; the sin-offering with silken cords, like unto cart-ropes. Pride, in their acts of humiliation, had the upper hand.

Woe to them that draw iniquity with (y) cords of vanity, and sin as it were with a cart rope:
(y) Who use all allurements, opportunities and excuses to harden their conscience in sin.

Woe unto them that draw iniquity with cords of vanity,.... The prophet returns to the wicked again, and goes on with the account of their sin and punishment; and here describes such, not that are drawn into sin unawares, through the prevalence of their own hearts' lusts and corruptions, through the temptations of Satan, the snares of the world, or the persuasions of others; but such who draw it to themselves, seek after it, and willingly commit it; who rush and force themselves into it; who solicit it, and seek and take all occasions and opportunities of doing it; and take a great deal of pains about it; and make use of all arguments, reasonings, and pretences they can devise, to engage themselves and others in the practice of it; which are all cords of vanity, fallacious and deceitful.
And sin as it were with a cart rope; using all diligence, wisdom, policy, and strength; labouring with all might and main to effect it. Some by "iniquity" and "sin" understand punishment, as the words used sometimes signify; and that the sense is, that such persons described by their boldness and impudence in sinning, by their impenitence and hardness of heart, and by adding sin to sin, draw upon themselves swift destruction, and the greater damnation. The Targum interprets it of such that begin with lesser sins, and increase to more ungodliness; paraphrasing it thus,
"woe to them that begin to sin a little, and they go on and increase until that they are strong, and "their" sins "are" as a cart rope;''
to which agrees that saying in the Talmud (g),
"the evil imagination or corruption of nature at first is like a spider's thread, but at last it is like to cart ropes; as it is said, "woe to them that draw iniquity", &c.''
(g) T. Bab. Succa, fol. 52. 1. & Sanhedrin, fol. 99. 2. Vid. Bereshit Rabba, sect. 22. fol. 19. 2.

Third Woe--against obstinate perseverance in sin, as if they wished to provoke divine judgments.
iniquity--guilt, incurring punishment [MAURER].
cords, &c.--cart-rope--Rabbins say, "An evil inclination is at first like a fine hair-string, but the finishing like a cart-rope." The antithesis is between the slender cords of sophistry, like the spider's web (Isaiah 59:5; Job 8:14), with which one sin draws on another, until they at last bind themselves with great guilt as with a cart-rope. They strain every nerve in sin.
vanity--wickedness.
sin--substantive, not a verb: they draw on themselves "sin" and its penalty recklessly.

The third woe is directed against the supposed strong-minded men, who called down the judgment of God by presumptuous sins and wicked words. "Woe unto them that draw crime with cords of lying, and sin as with the rope of the waggon." Knobel and most other commentators take mâshak in the sense of attrahere (to draw towards one's self): "They draw towards them sinful deeds with cords of lying palliation, and the cart-rope of the most daring presumption;" and cite, as parallel examples, Job 40:24 and Hosea 11:4. But as mâshak is also used in Deuteronomy 21:3 in the sense of drawing in a yoke, that is to say, drawing a plough or chariot; and as the waggon or cart (agâlâh, the word commonly used for a transport-waggon, as distinguished from mercâbâh, the state carriage or war chariot is expressly mentioned here, the figure employed is certainly the same as that which underlies the New Testament ἑτεροζυγεῖν ("unequally yoked," 2-Corinthians 6:14). Iniquity was the burden which they drew after them with cords of lying (shâv'h : see at Psalm 26:4 and Job 15:31), i.e., "want of character or religion;" and sin was the waggon to which they were harnessed as if with a thick cart-rope (Hofmann, Drechsler, and Caspari; see Ewald, 221, a). Iniquity and sin are mentioned here as carrying with them their own punishment. The definite העון (crime or misdeed) is generic, and the indefinite הטּאה qualitative and massive. There is a bitter sarcasm involved in the bold figure employed. They were proud of their unbelief; but this unbelief was like a halter with which, like beasts of burden, they were harnessed to sin, and therefore to the punishment of sin, which they went on drawing further and further, in utter ignorance of the waggon behind them.

That draw - That are not only drawn to sin by the allurements of the world; but are active and illustrious in drawing sin to themselves. Cords - Or, with cords of lying, as the last word frequently signifies, with vain and deceitful arguments and pretences, whereby sinners generally draw themselves to sin. A rope - With all their might, as beasts commonly do that draw carts with ropes.