23 and that the whole land of it is sulfur, and salt, and a burning, that it is not sown, nor bears, nor any grass grows therein, like the overthrow of Sodom and Gomorrah, Admah and Zeboiim, which Yahweh overthrew in his anger, and in his wrath: 24 even all the nations shall say, “Why has Yahweh done thus to this land? What does the heat of this great anger mean?” 25 Then men shall say, “Because they forsook the covenant of Yahweh, the God of their fathers, which he made with them when he brought them forth out of the land of Egypt, 26 and went and served other gods, and worshiped them, gods that they didn’t know, and that he had not given to them: 27 therefore the anger of Yahweh was kindled against this land, to bring on it all the curse that is written in this book; 28 and Yahweh rooted them out of their land in anger, and in wrath, and in great indignation, and cast them into another land, as at this day.” 29 The secret things belong to Yahweh 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.