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Commentary on Deuteronomy 31 verses 14–21
Here, I. Moses and Joshua are summoned to attend the divine majesty at the door of the tabernacle, Deu 31:14. Moses is told again that he must shortly die; even those that are most ready and willing to die have need to be often reminded of the approach of death. In consideration of this, he must come himself to meet God; for whatever improves our communion with God furthers our preparation for death. He must also bring Joshua with him to be presented to God for a successor, and to receive his commission and charge. Moses readily obeys the summons, for he was not one of those that look with an evil eye upon their successors, but, on the contrary, rejoiced in him.
II. God graciously gives them the meeting: He appeared in the tabernacle (as the shechinah used to appear) in a pillar of a cloud, v. 15. This is the only time in all this book that we read of the glory of God appearing, whereas we often read of it in the three foregoing books, which perhaps signifies that in the latter days, under the evangelical law, such visible appearances as these of the divine glory are not to be expected, but we must take heed to the more sure word of prophecy.
III. He tells Moses that, after his death, the covenant which he had taken so much pains to make between Israel and their God would certainly be broken. 1. That Israel would forsake God, v. 16. And we may be sure that if the covenant between God and man be broken the blame must lie on man, it is he that breaks it; we have often observed it, That God never leaves any till they first leave him. Worshipping the gods of the Canaanites (who had been the natives, but henceforward were to be looked upon as the strangers of that land) would undoubtedly be counted a deserting of God, and, like adultery, a violation of the covenant. Thus still those are revolters from Christ, and will be so adjudged, who either make a god of their money by reigning covetousness or a god of their belly by reigning sensuality. Those that turn to other gods (v. 18) forsake their own mercies. This apostasy of theirs is foretold to be the effect of their prosperity (v. 20): They shall have eaten and filled themselves; this is all they will aim at in eating, to gratify their own appetites, and then they will wax fat, grow secure and sensual; their security will take off their dread of God and his judgments; and their sensuality will incline them to the idolatries of the heathen, which made provision for the flesh to fulfil the lusts of it. Note, God has a clear and infallible foresight of all the wickedness of the wicked, and has often covenanted with those who he knew would deal very treacherously (Isa 48:8), and conferred many favours on those who he knew would deal very ungratefully. 2. That then God would forsake Israel; and justly does he cast those off who had so unjustly cast him off (v. 17): My anger shall be kindled against them, and I will forsake them. His providence would forsake them, no longer to protect and prosper them, and then they would become a prey to all their neighbours. His spirit and grace would forsake them, no longer to teach and guide them, and then they would be more and more bigoted, besotted, and hardened in their idolatries. Thus many evils and troubles would befal them. (v. 17, 21), which would be such manifest indications of God's displeasure against them that they themselves would be constrained to own it: Have not these evils come upon us because our God is not among us? Those that have sinned away their God will find that thereby they pull all mischiefs upon their own heads. But that which completed their misery was that God would hide his face from them in that day, that day of their trouble and distress, v. 18. Whatever outward troubles we are in, if we have but the light of God's countenance, we may be easy. But, if God hide his face from us and our prayers, we are undone.
IV. He directs Moses to deliver them a song, in the composing of which he should be divinely inspired, and which should remain a standing testimony for God as faithful to them in giving them warning, and against them as persons false to themselves in not taking the warning, v. 19. The written word in general, as well as this song in particular, is a witness for God against all those that break covenant with him. It shall be for a testimony, Mat 24:14. The wisdom of man has devised many ways of conveying the knowledge of good and evil, by laws, histories, prophecies, proverbs, and, among the rest, by songs; each has its advantages. And the wisdom of God has in the scripture made use of them all, that ignorant and careless men might be left inexcusable. 1. This song, if rightly improved, might be a means to prevent their apostasy; for in the inditing of it God had an eye to their present imagination, now, before they were brought into the land of promise, Deu 31:21. God knew very well that there were in their hearts such gross conceits of the deity, and such inclinations of idolatry, that they would be tinder to the sparks of that temptation; and therefore in this song he gives them warning of their danger that way. Note, The word of God is a discerner of the thoughts and intents of men's hearts, and meets with them strangely by its reproofs and corrections, Heb 4:12. Compare Co1 14:25. Ministers who preach the word know not the imaginations men go about, but God, whose word it is, knows perfectly. 2. If this song did not prevent their apostasy, yet it might help to bring them to repentance, and to recover them from their apostasy. When their troubles come upon them, this song shall not be forgotten, but may serve as a glass to show them their own faces, that they may humble themselves, and return to him from whom they have revolted. Note, Those for whom God has mercy in store he may leave to fall, yet he will provide means for their recovery. Medicines are prepared before-hand for their cure.
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SUMMARY
Deuteronomy 31:19 records a pivotal divine command to Moses and Joshua: to compose and diligently teach a specific song to the Israelites. This divinely inspired composition, later known as the Song of Moses, was designed for meticulous learning and perpetual recitation by the entire nation. Its profound and enduring purpose was to serve as an irrefutable, legal-like witness against the children of Israel, testifying to God's prior warnings and their anticipated future apostasy, thereby ensuring their accountability to the sacred covenant established with Yahweh.
CONTEXT
EXPOSITION AND ANALYSIS
Key Word Analysis
Verse Breakdown
Literary Devices
Deuteronomy 31:19 masterfully employs several potent literary devices to convey its profound message. Personification is strikingly evident in the concept of the "song" acting as a "witness," imbuing an inanimate object with the active agency and judicial function of a legal accuser. This elevates the song beyond a mere composition to an active participant in God's righteous dealings with Israel. The phrase "put it in their mouths" is a powerful idiom or metonymy, where a physical action (placing something into the mouth) serves as a vivid representation of a deeper spiritual and intellectual internalization (thorough memorization, profound understanding, and ready articulation). This emphasizes the profound level of engagement and assimilation God expects with His divine word. Furthermore, the entire command functions as a clear instance of Foreshadowing, as it explicitly anticipates Israel's future disobedience and the subsequent, critical need for this song to serve as an enduring testimony against them. This prophetic element powerfully highlights God's omniscience and the predetermined, vital role of the song in the unfolding divine-human drama. The pervasive legalistic language of "witness" also introduces a compelling legal metaphor, framing the covenant relationship in terms of a binding agreement with clearly stipulated terms and inevitable consequences, where the song functions as an enduring, self-incriminating piece of evidence.
THEOLOGICAL AND THEMATIC CONNECTIONS
Deuteronomy 31:19 profoundly illustrates God's unwavering commitment to His covenant, even in His divine foreknowledge of Israel's impending unfaithfulness. It reveals a God who meticulously provides ample warning and meticulously ensures accountability, thereby demonstrating His perfect justice in harmonious conjunction with His steadfast love and grace. The song serves as a tangible, divinely ordained expression of God's fervent desire for His people to remain in an enduring covenant relationship, providing a constant, internal reminder of their sacred obligations and the dire consequences of straying from His path. This divine strategy underscores the enduring power, absolute necessity, and living efficacy of God's word as a witness—not only to His immutable character and divine commands but also to humanity's inherent responsibility and accountability. It teaches us that God's truth is not merely for intellectual assent or academic study but for deep, transformative internalization, profoundly shaping our lives and serving as the ultimate standard by which we are held accountable before Him.
REFLECTION AND APPLICATION
Deuteronomy 31:19 offers a profoundly insightful lesson on the very nature of divine communication and the inherent reality of human accountability. Just as God meticulously commanded a specific song to be written and diligently taught to the Israelites as a perpetual, internal witness, so too has He graciously given us His complete, inspired, and infallible Word, the Bible, as a comprehensive witness to His majestic character, His sovereign will, and His glorious redemptive plan for humanity. This verse challenges each of us to deeply consider the true depth of our engagement with Holy Scripture. Are we merely reading it superficially, or are we earnestly allowing it to be "put in our mouths"—meaning, are we internalizing, memorizing, meditating upon, and allowing it to become a living, transformative part of our daily lives and deepest convictions? The Song of Moses served as a stark reminder of Israel's covenant obligations and the inevitable consequences of disobedience. For us today, God's inspired Word serves as an infallible guide for righteous living, an inexhaustible source of comfort and wisdom, and a prophetic warning against straying from His perfect path. It powerfully reminds us that our knowledge of God's truth brings with it a profound and inescapable responsibility. We are unequivocally called not only to hear but to heed, not only to read but to live by every word, so that the Word becomes a faithful witness for us, guiding us in steadfast faithfulness and true righteousness, rather than a condemning witness against us in future judgment.
Questions for Reflection
FAQ
Why did God command a "song" specifically, rather than just another written law or warning?
Answer: God commanded a song for several profoundly strategic reasons, leveraging the unique, inherent properties of music and poetry within ancient oral cultures. Songs are intrinsically memorable, rhythmic, and easily transmitted across generations, making them an unparalleled medium for embedding crucial truths, warnings, and historical narratives deep within a community's collective memory. Unlike a dry, static legal text, a song could be sung, recited, and passed down through communal gatherings and daily life, thereby becoming a living, dynamic part of their cultural and spiritual heritage. This ensured that the profound message of God's covenant, His unwavering faithfulness, and Israel's anticipated unfaithfulness would not be forgotten, even if written texts were lost, ignored, or became inaccessible. The emotional resonance and communal nature of song also meant it could evoke deeper reflection, conviction, and serve as a more potent "witness" when the people eventually strayed, powerfully reminding them of the very words they had sung and heard from childhood. The full content of this divinely ordained song is found in Deuteronomy 32, demonstrating its comprehensive theological, historical, and prophetic scope.
CHRIST-CENTERED FULFILLMENT
Deuteronomy 31:19, with its profound emphasis on a divinely commanded song serving as a witness against a disobedient Israel, finds its ultimate and most profound Christ-centered fulfillment in the New Testament. The Old Covenant Law, including this prophetic song, served as a "tutor" or "guardian" (παιδαγωγός, paidagogos) to lead humanity to Christ, meticulously revealing humanity's inherent inability to perfectly keep God's righteous commands and thereby highlighting the desperate need for a Savior (Galatians 3:24). While the Song of Moses testified to Israel's inevitable failure and the dire consequences of their sin, Jesus Christ stands as the ultimate, perfect, and faithful "witness" (Revelation 1:5), not against humanity in condemnation, but for humanity in glorious redemption. He is the living Word of God made flesh (John 1:14), who perfectly fulfilled every demand of the Law and bore its curses on the cross, thereby irrevocably removing the "certificate of debt" that stood as a witness against us, which was our sin (Colossians 2:14). Through His unparalleled atoning sacrifice, the condemnation that the Law and its warnings (like this song) pointed to is fully satisfied and eternally removed. Now, the "new song" sung by the redeemed in Christ (Revelation 5:9) is one of triumphant praise for God's boundless salvation found exclusively in Christ—a testament not to our failure, but to His triumphant grace, perfect faithfulness, and eternal victory.