For this commandment, which I command thee. This declaration is like the preceding, and tends to the same end; for Moses commends in it the Law, on account of its easiness; because God does not propound to us obscure enigmas to keep our minds in suspense, and to torment us with difficulties, but teaches familiarly whatever is necessary, according to the capacity, and consequently the ignorance of the people. Therefore, in Isaiah 45:19 He reproves the Jews for having wandered in darkness through their own depravity and folly; because He had not spoken to them in secret, nor said in vain [1] to the seed of Jacob, Seek ye me. But Moses here invites them to learn, because they had an easy and clear method of instruction set before their eyes, and would not lose their labor; for we know that it is very often made an excuse for idleness, if great labor without much profit is to be applied to deep and difficult studies. Moses, therefore, declares that the Law is not hard to be understood, so as to demand inordinate fatigue in its study; but that God there speaks distinctly and explicitly, and that nothing is required of them but diligent application. More-over, he thus takes away from them every pretext for ignorance, since, with so much light, they cannot err, except by wilfully blinding themselves, or shutting their eyes. Whence, also, we gather, how impious are the babblings of the Papists that the Scripture is beset by thick darkness, and how wicked is their driving away the people from approaching it, as if it were some labyrinth. Surely they thus must needs accuse the Holy Spirit of falsehood, who so abundantly asserts its comprehensibleness, (claritatem,) or else they malign itself by their blasphemous taunts. But if the ancient people were left without excuse, unless they kept in the right way, when they had the Law for their mistress and director, our stupidity must be worthy of double and triple condemnation, if we do not make progress in the Gospel, wherein God has opened all the treasures of His wisdom, as far as is sufficient for salvation. The Sophists improperly and ignorantly wrest this passage to prove the freedom of the will. (They allege ) that Moses here declares the precepts of the Law not to be above our reach. What? Does he state that the keeping of them is within the compass of our strength? Surely the words convey nothing of the sort; neither can this sense be elicited from them, if his intention be duly weighed. For he merely encourages the Jews, and commands them to be diligent disciples of the Law, because they will easily understand whatever is enjoined by God therein. But the power of performance is a very different thing from understanding. Besides, Paul, with very good reason, accommodates this passage to the Gospel, (Romans 10:8;) because it would profit nothing to comprehend the doctrine itself in the mind, unless reverence and a serious disposition to obey be superadded. But he takes it for granted, that to have a good will is so far from being in our own power, that we are not even competent to think aright. Hence it follows, that what is here stated falls to the ground as frivolous, and spoken to no purpose, if it be applied simply to the Law. Paul also considers another thing, viz., that because the Law requires a perfect righteousness, it cannot be received by any mortal fruitfully; for however any one may study to obey God, yet he will still be far from perfection; and, therefore, it is necessary to come to the Gospel, wherein that rigorous requirement is relaxed, because, through the interposition of pardon, the will to obey is pleasing to God instead of perfect obedience. For Paul insists on the latter verse, "The word is nigh in the mouth, and in the heart, that the people may do it." Now, it is clear that men's hearts are strongly and obstinately opposed to the Law; and that in the Law itself is contained only a dead and deadly letter; how then could the literal doctrine have a place in the heart? But if God, by the Spirit of regeneration, corrects the depravity of the heart and softens its hardness, this is not the property of the Law, but of the Gospel. Again, because in the children of God, even after they are regenerated, there always abide the remainders of carnal desires, no mortal will be found who can perform the Law. But in the Gospel God receives, with fatherly indulgence, what is not absolutely perfect. The word of God, therefore, does not begin to penetrate into the heart, and to produce its proper fruit in the lips, until Christ shines upon us with His Spirit and gratuitous pardon. Wherefore Paul most truly concludes that this is the word of faith which is preached in the Gospel; both because the Law does not efficaciously lead men to God, and because the keeping of it is impossible, on account of its extreme rigor. But this is the peculiar blessing of the new covenant, that the Law is written on men's hearts, and engraven on their inward parts; whilst that severe requirement is relaxed, so that the vices under which believers still labor are no obstacle to their partial and imperfect obedience being pleasant to God.

Footnotes

1 - In A. V., it will be remembered, the words, "in vain," are connected with "Seek ye me." "I said not unto the seed of Jacob, Seek ye me in vain."

Ignorance of the requirements of the law cannot be pleaded Deuteronomy 30:10-14; hence, Deuteronomy 30:15-20 life and death, good and evil, are solemnly set before the people for their own choice; and an earnest exhortation to choose the better part concludes the address.
Deuteronomy 30:11-14. "The righteousness which is of faith" is really and truly described in these words of the Law; and, under Paul's guidance (see marginal references) we affirm was intended so to be. For the simplicity and accessibility which Moses here attributes to the Law of God neither is nor can be experimentally found in it except through the medium of faith; even though outwardly and in the letter that Law be written out for us so "that he may run that readeth," and be set forth in its duties and its sanctions as plainly as it was before the Jews by Moses. The seeming ease of the commandment, and yet its real impossibility to the natural man, form part of the qualifications of the Law to be our schoolmaster to bring us unto Christ.

Not hidden from thee - Rather, not too hard for thee, as in Deuteronomy 17:8.
Neither is it far off - Compare Luke 17:21.

This commandment - is not hidden - Not too wonderful or difficult for thee to comprehend or perform, as the word נפלאת niphleth implies. Neither is it far off - the word or doctrine of salvation shall be proclaimed in your own land; for He is to be born in Bethlehem of Judah, who is to feed and save Israel; and the Prophet who is to teach them is to be raised up from among their brethren.

For this commandment which I command thee this day, it [is] (h) not hidden from thee, neither [is] it far off.
(h) The law is so evident that no one can pretend ignorance.

For this commandment which I command thee this day,.... Which the Jews understand of the law, but the Apostle Paul has taught us to interpret it of the word of faith, the Gospel preached by him and other ministers, Romans 10:6; which better suits with the context, and the prophecies before delivered concerning the conversion of the Jews, their reception of the Messiah, and his Gospel:
it is not hidden from thee; being clearly revealed, plainly and fully preached: if hidden from any, it is from them that are lost; from the wise and prudent, while it is revealed to babes, and given to them to know the mysteries of it: or too "wonderful" (q); hard, difficult, and impossible; its doctrines, are not beyond the understanding of an enlightened person; they are all plain to them that understand and find the knowledge of them; and the ordinances of it are not too hard and difficult to be kept; the commandments of Christ are not grievous:
neither is it far off; for though it is good, news from a far country, from heaven, it is come down from thence; it is brought nigh in the ministry of the word to the ears and hearts of men.
(q) "mirabile", Montanus, Cocceius.

The law is not too high for thee. It is not only known afar off; it is not confined to men of learning. It is written in thy books, made plain, so that he who runs may read it. It is in thy mouth, in the tongue commonly used by thee, in which thou mayest hear it read, and talk of it among thy children. It is delivered so that it is level to the understanding of the meanest. This is especially true of the gospel of Christ, to which the apostle applies it. But the word is nigh us, and Christ in that word; so that if we believe with the heart, that the promises of the Messiah are fulfilled in our Lord Jesus, and confess them with our mouth, we then have Christ with us.

THE COMMANDMENT IS MANIFEST. (Deuteronomy 30:11-14)
For this commandment . . . is not hidden . . . neither is it far off--That law of loving and obeying God, which was the subject of Moses' discourse, was well known to the Israelites. They could not plead ignorance of its existence and requirements. It was not concealed as an impenetrable mystery in heaven, for it had been revealed; nor was it carefully withheld from the people as a dangerous discovery; for the youngest and humblest of them were instructed in those truths, which were subjects of earnest study and research among the wisest and greatest of other nations. They were not under a necessity of undertaking long journeys or distant voyages, as many ancient sages did in quest of knowledge. They enjoyed the peculiar privilege of a familiar acquaintance with it. It was with them a subject of common conversation, engraven on their memories, and frequently explained and inculcated on their hearts. The apostle Paul (Romans 10:6-8) has applied this passage to the Gospel, for the law of Christ is substantially the same as that of Moses, only exhibited more clearly in its spiritual nature and extensive application; and, accompanied with the advantages of Gospel grace, it is practicable and easy.

The fulfilment of this condition is not impossible, nor really very difficult. This natural though leads to the motive, which Moses impresses upon the hearts of the people in Deuteronomy 30:11-14, viz., that He might turn the blessing to them. God had done everything to render the observance of His commandments possible to Israel. "This commandment" (used as in Deuteronomy 6:1 to denote the whole law) is "not too wonderful for thee," i.e., is not too hard to grasp, or unintelligible (vid., Deuteronomy 17:8), nor is it too far off: it is neither in heaven, i.e., at an inaccessible height; nor beyond the sea, i.e., at an unattainable distance, at the end of the world, so that any one could say, Who is able to fetch it thence? but it is very near thee, in thy mouth and in thy heart to do it. It not only lay before the people in writing, but it was also preached to them by word of mouth, and thus brought to their knowledge, so that it had become a subject of conversation as well as of reflection and careful examination. But however near the law had thus been brought to man, sin had so estranged the human heart from the word of God, that doing and keeping the law had become invariably difficult, and in fact impossible; so that the declaration, "the word is in thy heart," only attains its full realization through the preaching of the gospel of the grace of God, and the righteousness that is by faith; and to this the Apostle Paul applies the passage in Romans 10:8.

This commandment - The great command of loving and obeying God, which is the sum of the law, of which yet he doth not here speak, as it is in itself, but as it is molified and accompanied with the grace of the gospel. The meaning is, that tho' the practice of God's laws be now far from us, and above our strength, yet, considering the advantage of gospel grace, whereby God enables us to do our duty, it is near and easy to us, who believe. And so this well agrees with Romans 10:6, &c. where St. Paul applies this place to the righteousness of faith. Is not hidden - Hebrews. Is not too wonderful for thee, not too hard for thee to know and do. The will of God, which is but darkly manifested to other nations, Acts 17:27, is clearly and fully revealed unto thee: thou canst not pretend ignorance or invincible difficulty.