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1 These are the words of the covenant, which the LORD commanded Moses to make with the children of Israel in the land of Moab, beside the covenant which he made with them in Horeb. 2 And Moses called unto all Israel, and said unto them, Ye have seen all that the LORD did before your eyes in the land of Egypt unto Pharaoh, and unto all his servants, and unto all his land; 3 The great temptations which thine eyes have seen, the signs, and those great miracles: 4 Yet the LORD hath not given you an heart to perceive, and eyes to see, and ears to hear, unto this day. 5 And I have led you forty years in the wilderness: your clothes are not waxen old upon you, and thy shoe is not waxen old upon thy foot. 6 Ye have not eaten bread, neither have ye drunk wine or strong drink: that ye might know that I am the LORD your God. 7 And when ye came unto this place, Sihon the king of Heshbon, and Og the king of Bashan, came out against us unto battle, and we smote them: 8 And we took their land, and gave it for an inheritance unto the Reubenites, and to the Gadites, and to the half tribe of Manasseh. 9 Keep therefore the words of this covenant, and do them, that ye may prosper in all that ye do. 10 Ye stand this day all of you before the LORD your God; your captains of your tribes, your elders, and your officers, with all the men of Israel, 11 Your little ones, your wives, and thy stranger that is in thy camp, from the hewer of thy wood unto the drawer of thy water: 12 That thou shouldest enter into covenant with the LORD thy God, and into his oath, which the LORD thy God maketh with thee this day: 13 That he may establish thee to day for a people unto himself, and that he may be unto thee a God, as he hath said unto thee, and as he hath sworn unto thy fathers, to Abraham, to Isaac, and to Jacob. 14 Neither with you only do I make this covenant and this oath; 15 But with him that standeth here with us this day before the LORD our God, and also with him that is not here with us this day: 16 (For ye know how we have dwelt in the land of Egypt; and how we came through the nations which ye passed by; 17 And ye have seen their abominations, and their idols, wood and stone, silver and gold, which were among them:) 18 Lest there should be among you man, or woman, or family, or tribe, whose heart turneth away this day from the LORD our God, to go and serve the gods of these nations; lest there should be among you a root that beareth gall and wormwood; 19 And it come to pass, when he heareth the words of this curse, that he bless himself in his heart, saying, I shall have peace, though I walk in the imagination of mine heart, to add drunkenness to thirst: 20 The LORD will not spare him, but then the anger of the LORD and his jealousy shall smoke against that man, and all the curses that are written in this book shall lie upon him, and the LORD shall blot out his name from under heaven. 21 And the LORD shall separate him unto evil out of all the tribes of Israel, according to all the curses of the covenant that are written in this book of the law: 22 So that the generation to come of your children that shall rise up after you, and the stranger that shall come from a far land, shall say, when they see the plagues of that land, and the sicknesses which the LORD hath laid upon it; 23 And that the whole land thereof is brimstone, and salt, and burning, that it is not sown, nor beareth, nor any grass groweth therein, like the overthrow of Sodom, and Gomorrah, Admah, and Zeboim, which the LORD overthrew in his anger, and in his wrath: 24 Even all nations shall say, Wherefore hath the LORD done thus unto this land? what meaneth the heat of this great anger? 25 Then men shall say, Because they have forsaken the covenant of the LORD God of their fathers, which he made with them when he brought them forth out of the land of Egypt: 26 For they went and served other gods, and worshipped them, gods whom they knew not, and whom he had not given unto them: 27 And the anger of the LORD was kindled against this land, to bring upon it all the curses that are written in this book: 28 And the LORD rooted them out of their land in anger, and in wrath, and in great indignation, and cast them into another land, as it is this day. 29 The secret things belong unto the LORD our God: but those things which are revealed belong unto us and to our children for ever, that we may do all the words of this law.
[AD 56] Romans on Deuteronomy 29:3-4
I say then, Hath God cast away his people? God forbid. For I also am an Israelite, of the seed of Abraham, of the tribe of Benjamin. God hath not cast away his people which he foreknew. Wot ye not what the scripture saith of Elias? how he maketh intercession to God against Israel, saying, Lord, they have killed thy prophets, and digged down thine altars; and I am left alone, and they seek my life. But what saith the answer of God unto him? I have reserved to myself seven thousand men, who have not bowed the knee to the image of Baal. Even so then at this present time also there is a remnant according to the election of grace. And if by grace, then is it no more of works: otherwise grace is no more grace. But if it be of works, then is it no more grace: otherwise work is no more work. What then? Israel hath not obtained that which he seeketh for; but the election hath obtained it, and the rest were blinded (According as it is written, God hath given them the spirit of slumber, eyes that they should not see, and ears that they should not hear;) unto this day. [Deuteronomy 29:3-4] And David saith, Let their table be made a snare, and a trap, and a stumbling block, and a recompence unto them: Let their eyes be darkened, that they may not see, and bow down their back alway.
[AD 1781] Richard Challoner on Deuteronomy 29:4
Hath not given you: Through your own fault and because you resisted his grace.
[AD 1781] Richard Challoner on Deuteronomy 29:19
The drunken: absumat ebria sitientem. It is a proverbial expression, which may either be understood, as spoken by the sinner, blessing, that is, flattering himself in his sins with the imagination of peace, and so great an abundance as may satisfy, and as it were, consume all thirst and want: or it may be referred to the root of bitterness, spoken of before, which being drunken with sin may attract, and by that means consume, such as thirst after the like evils.
[AD 253] Origen of Alexandria on Deuteronomy 29:23
He pretends then that he does not see your future so that he may preserve your self-determination by not foretelling or foreknowing whether you will repent or not. So he says to the prophet, “Speak, perhaps they will repent.” You will find numerous other passages where Scripture talks about God “taking on the manners of” man. If you hear of the anger of God and his wrath, do not suppose that anger and wrath are passions of God. The purposes of using this way of speaking are for converting and educating the infant, since we also use a fearful expression with children, not from an actual state of mind but because of a purpose to cause fear.

[AD 1781] Richard Challoner on Deuteronomy 29:29
Secret things: As much as to say, secret things belong to, and are known to, God alone; our business must be to observe what he has revealed and manifested to us, and to direct our lives accordingly.