23 the whole land burned out with brimstone and salt, nothing sown and nothing growing, where no plant can sprout, an overthrow like that of Sodom and Gomorrah, Admah, and Zeboiim, which the Lord overthrew in his anger and wrath-- 24 all the nations will say, 'Why has the Lord done thus to this land? What caused the heat of this great anger?' 25 Then people will say, 'It is because they abandoned the covenant of the Lord, the God of their fathers, which he made with them when he brought them out of the land of Egypt, 26 and went and served other gods and worshiped them, gods whom they had not known and whom he had not allotted to them. 27 Therefore the anger of the Lord was kindled against this land, bringing upon it all the curses written in this book, 28 and the Lord uprooted them from their land in anger and fury and great wrath, and cast them into another land, as they are this day.' 29 "The secret things belong to the Lord our God, but the things that are revealed belong to us and to our children forever, that we may do all the words of this law.

Matthew Henry's Commentary on Deuteronomy 29:23-30

Commentary on Deuteronomy 29:22-28

(Read Deuteronomy 29:22-28)

Idolatry would be the ruin of their nation. It is no new thing for God to bring desolating judgments on a people near to him in profession. He never does this without good reason. It concerns us to seek for the reason, that we may give glory to God, and take warning to ourselves. Thus the law of Moses leaves sinners under the curse, and rooted out of the Lord's land; but the grace of Christ toward penitent, believing sinners, plants them again in their land; and they shall no more be pulled up, being kept by the power of God.

Commentary on Deuteronomy 29:29

(Read Deuteronomy 29:29)

Moses ends his prophecy of the Jews' rejection, just as St. Paul ends his discourse on the same subject, when it began to be fulfilled, Romans 11:33. We are forbidden curiously to inquire into the secret counsels of God, and to determine concerning them. But we are directed and encouraged, diligently to seek into that which God has made known. He has kept back nothing that is profitable for us, but only that of which it is good for us to be ignorant. The end of all Divine revelation is, not to furnish curious subjects of speculation and discourse, but that we may do all the words of this law, and be blessed in our deed. This, the Bible plainly reveals; further than this, man cannot profitably go. By this light he may live and die comfortably, and be happy for ever.