Deuteronomy stands on the plains of Moab as Israel waits to enter the Promised Land. Its name comes from the Greek for "second law," but the book is less a new code than a renewed covenant—Moses preaching the law afresh to a generation that had grown up in the wilderness. Cast as a series of farewell sermons, it gathers the journey from Egypt to the edge of Canaan into one urgent appeal: love and obey the LORD, and live.
Author, Date, and Occasion
The book presents itself as the words of Moses, delivered around 1400–1200 BC (depending on the date of the Exodus) to Israel encamped east of the Jordan, shortly before Moses' death and Joshua's leadership. Historic Jewish and Christian tradition, and Jesus himself (Matthew 19:7–8; Mark 12:26), attribute the substance of Deuteronomy to Moses. Many modern critical scholars, by contrast, connect the book to a later "Deuteronomic" reform—often linked to the law-book discovered under King Josiah in 2 Kings 22—and see it as composed or compiled centuries afterward. The narrator's note of Moses' death in chapter 34 shows that at least the closing verses come from another hand, but the book's covenant structure closely mirrors ancient Near Eastern treaties of the second millennium, and the evangelical and Reformed tradition has confidently received it as resting on genuine Mosaic teaching.
Themes
At its heart Deuteronomy is about covenant love. The Shema—"Hear, O Israel: The LORD our God, the LORD is one. You shall love the LORD your God with all your heart and with all your soul and with all your might" (6:4–5)—is the book's pulse, the command Jesus called the greatest of all. Flowing from it are repeated calls to remember God's saving acts, to teach the next generation, to worship the one true God at the place he chooses, and to care for the poor, the alien, the widow, and the orphan. Running through everything is the solemn choice set before Israel: blessing for obedience, curse for rebellion—"I have set before you life and death... therefore choose life" (30:19).
Structure
The book unfolds as three great addresses framed by covenant ceremony. Chapters 1–4 review God's faithfulness in the wilderness journey. Chapters 5–26 form the heart of Moses' teaching: a restatement of the Ten Commandments and an unfolding of the law for life in the land. Chapters 27–30 set out covenant blessings and curses and a final summons to choose life. Chapters 31–34 close with the commissioning of Joshua, the Song and the Blessing of Moses, and the account of his death on Mount Nebo.
Deuteronomy and Christ
Deuteronomy reaches forward to Jesus in striking ways. Moses promised that God would raise up "a prophet like me from among you" (18:15), a hope the New Testament sees fulfilled in Christ (Acts 3:22–23). Where Israel failed in the wilderness, Jesus—tempted forty days—answered Satan three times with words from this very book (Matthew 4:1–10), embodying the perfect covenant obedience Israel never offered. The curse Deuteronomy pronounces on the disobedient, and even on the one "hanged on a tree" (21:23), Christ bore on the cross, becoming "a curse for us" so that the covenant's blessing might come to all (Galatians 3:13).
So Deuteronomy is not a dead letter but a living word pointing beyond itself. It promised a circumcised heart that would truly love God (30:6)—a promise the prophets carried forward and the gospel fulfills as the Spirit writes God's law within. In its great choice between life and death, Deuteronomy sets before every reader the same call answered finally in Jesus, who is himself the Word, the obedient Son, and the life he urges us to choose.