Summary
Deuteronomy is the fifth and final book of the Pentateuch—the closing volume of the Torah—standing after Genesis, Exodus, Leviticus, and Numbers. Its name comes from the Greek for "second law," not because it gives a new law, but because it gathers Moses' final preaching of God's covenant to Israel on the plains of Moab, just before the people cross the Jordan into the promised land. Joshua, Moses' assistant and successor, is commissioned within its closing chapters to lead Israel forward (see Deuteronomy 31:23).
At the heart of Deuteronomy is the Shema, Israel's great creed: "Hear, O Israel: The Lord is our God, the Lord alone. You shall love the Lord your God with all your heart, and with all your soul, and with all your might" Deuteronomy 6:4–9. The verbs that follow—love, walk, keep, hold fast, serve—frame the whole book and resurface throughout Israel's later history. When Joshua dismissed the eastern tribes, he repeated this very charge to them, urging the same wholehearted devotion Joshua 22:1–6. These words function both as a mirror that exposes our shortfall and as a window to Christ, who loved perfectly, walked the promised land proclaiming the kingdom, kept the law completely, holds His people fast, and served by pouring out His life for our salvation. His perfect, alien righteousness is then credited to our account.
Deuteronomy also frames Israel's life as a witness to the surrounding nations. Diligent observance of God's statutes was itself meant to display wisdom: "Surely this great nation is a wise and discerning people" Deuteronomy 4:5–6. For Second Temple Judaism, Torah and wisdom were inseparable—God's self-revelation set before Israel two paths, obedience and life, or rebellion and death. Yet because the law cannot save fallen sinners, its deeper purpose is to drive us to the One who fulfills it for us. The Christian reads Deuteronomy not as a ladder to climb but as a tutor that points to Christ.
The book also contains the rules of warfare and the regulations for life in the land. Deuteronomy 20:10–18 distinguishes between distant cities, with which Israel could make peace, and the nations within Canaan, whose abominations—incest, divination, child sacrifice, and worse, cataloged again in Deuteronomy 18:9–11—had filled up the measure of God's patience. The Gibeonites' deception in Joshua: Servant of the Lord - Lesson 6 makes sense only against this background. So does the awe-filled scene at Mount Ebal and Mount Gerizim, where Joshua, obeying the command of Deuteronomy 11:26–30, inscribed a copy of the law on stones, built an altar, and read aloud every word of blessing and curse before the assembled people, as recounted in Joshua: Servant of the Lord - Lesson 5.
Pastorally, Deuteronomy reminds us that life with God is sustained by the Word. Joshua was charged not to let the book of the law depart from his mouth, but to meditate on it day and night Joshua: Servant of the Lord - Lesson 2. Apart from Scripture, only the error-filled valley of human reason remains. With Scripture, the church receives a steady diet of God's promises—promises that locate our identity, govern our worship, shape our witness, and finally lead us to the new and greater Joshua, Jesus Christ, who brings His people into the true land of rest.
Video citations
- Joshua: Servant of the Lord - Lesson 8 — Good morning. Let's join in prayer, please. Gracious Heavenly Father, we give you thanks for this time in your word for your word is truth. We thank you that you call us together on the Lord's day…
- Joshua: Servant of the Lord - Lesson 6 — Good morning. Let's join in prayer, please. Let's pray together, please. Gracious Heavenly Father, we give you thanks for today and this opportunity to be in your house. We pray now, O Lord, that…
- Joshua: Servant of the Lord - Lesson 5 — Good morning. Let's pray, please. Gracious Heavenly Father, we give you thanks for your word, for your word is truth. We ask Father for your blessing upon this lesson today. Guide us and lead us,…
- Joshua: Servant of the Lord - Lesson 2 — Good morning. Let's have a word of prayer, please. Gracious Heavenly Father, we give you thanks for this, your day, in which you call us and gather us to receive word and sacrament. Blessed we pray,…
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