16 You know the conditions in which we lived in Egypt and how we crisscrossed through nations in our travels. 17 You got an eyeful of their obscenities, their wood and stone, silver and gold junk-gods. 18 Don't let down your guard lest even now, today, someone - man or woman, clan or tribe - gets sidetracked from God, our God, and gets involved with the no-gods of the nations; lest some poisonous weed sprout and spread among you, 19 a person who hears the words of the Covenant-oath but exempts himself, thinking, "I'll live just the way I please, thank you," and ends up ruining life for everybody. 20 God won't let him off the hook. God's anger and jealousy will erupt like a volcano against that person. The curses written in this book will bury him. God will delete his name from the records.
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.