16 (for you know that we dwelt in the land of Egypt and that we came through the nations which you passed by, 17 and you saw their abominations and their idols which were among them--wood and stone and silver and gold); 18 so that there may not be among you man or woman or family or tribe, whose heart turns away today from the Lord our God, to go and serve the gods of these nations, and that there may not be among you a root bearing bitterness or wormwood; 19 and so it may not happen, when he hears the words of this curse, that he blesses himself in his heart, saying, 'I shall have peace, even though I follow the dictates of my heart'--as though the drunkard could be included with the sober. 20 The Lord would not spare him; for then the anger of the Lord and His jealousy would burn against that man, and every curse that is written in this book would settle on him, and the Lord would blot out his name from under heaven.
Matthew Henry's Commentary on Deuteronomy 29:16-20
Commentary on Deuteronomy 29:10-21
(Read Deuteronomy 29:10-21)
The national covenant made with Israel, not only typified the covenant of grace made with true believers, but also represented the outward dispensation of the gospel. Those who have been enabled to consent to the Lord's new covenant of mercy and grace in Jesus Christ, and to give up themselves to be his people, should embrace every opportunity of renewing their open profession of relation to him, and their obligation to him, as the God of salvation, walking according thereto. The sinner is described as one whose heart turns away from his God; there the mischief begins, in the evil heart of unbelief, which inclines men to depart from the living God to dead idols. Even to this sin men are now tempted, when drawn aside by their own lusts and fancies. Such men are roots that bear gall and wormwood. They are weeds which, if let alone, overspread the whole field. Satan may for a time disguise this bitter morsel, so that thou shalt not have the natural taste of it, but at the last day, if not before, the true taste shall be discerned. Notice the sinner's security in sin. Though he hears the words of the curse, yet even then he thinks himself safe from the wrath of God. There is scarcely a threatening in all the book of God more dreadful than this. Oh that presumptuous sinners would read it, and tremble! for it is a real declaration of the wrath of God, against ungodliness and unrighteousness of man.