23 And that all the land is a salt and smoking waste, not planted or giving fruit or clothed with grass, but wasted like Sodom and Gomorrah, Admah and Zeboiim, on which the Lord sent destruction in the heat of his wrath: 24 Truly all the nations will say, Why has the Lord done so to this land? what is the reason for this great and burning wrath? 25 Then men will say, Because they gave up the agreement of the Lord, the God of their fathers, which he made with them when he took them out of the land of Egypt: 26 And they went after other gods and gave them worship, gods who were strange to them, and whom he had not given them: 27 And so the wrath of the Lord was moved against this land, to send on it all the curse recorded in this book: 28 Rooting them out of their land, in the heat of his wrath and passion, and driving them out into another land, as at this day. 29 The secret things are the Lord our God's: but the things which have been made clear are ours and our children's for ever, so 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.