Lesson 11: The Mosaic Covenant: A Kingdom of Priests

Lesson at a Glance

Guiding question: What vocation and responsibilities did God give redeemed Israel at Sinai?
Big idea: The God who brought Israel out of bondage called the nation to belong to him in obedient, holy service. His commandments ordered that life; covenant blessings and curses made its responsibilities serious.
Primary texts: Exodus 19:1–8; 20:1–21; 24:3–8; Deuteronomy 4:1–14; 28:1–68; 30:15–20.
Key terms: Mosaic covenant — the covenant God gave Israel through Moses, with commanded responsibilities and stated consequences; holy — set apart to God; kingdom of priests — Israel’s national calling to serve God among the peoples, distinct from the particular priestly offices studied next; sanctions — the covenant’s stated consequences for obedience or disobedience.

Learning Objectives

By the end of this lesson, you should be able to:

Explain why redemption comes before Sinai’s commandments.
Identify the recipients and responsibilities of Israel’s priestly vocation.
Describe the ten commandments and the ratification of the covenant in their narrative setting.
Distinguish the Sinai events from Moses’ later instruction before entry into the land.
Explain how Mosaic blessings and curses differ from, without cancelling, the Abrahamic oath.

Why This Lesson Matters

Freedom from Pharaoh raises a further question: whose people will Israel now be, and how will they live? Exodus does not end with a nation free to invent its own gods and purposes. The deliverer brings Israel to himself and speaks to them about their life together.

Two mistakes obscure this movement. One makes commandments the price Israel paid to leave Egypt. The other assumes that, because rescue came first, obedience afterward does not matter. Exodus 19 holds together what both mistakes separate: God’s accomplished deliverance and the redeemed people’s real responsibility.

Sinai also prepares us to understand the prophets. Their later accusations of covenant unfaithfulness are not arbitrary complaints. Commandments, blessings, and curses have already defined the relationship. We must learn that foundation before following the later history of rebellion, judgment, and restoration.

The Story So Far

God called Abraham and bound himself by covenant and oath concerning offspring, land, and blessing. Lesson 10 established that God redeemed Israel from Egypt because he remembered his covenant with Abraham, Isaac, and Jacob, judged Egypt, and brought the people to himself for relationship and service (Genesis 15:13–18; Exodus 2:23–25; 6:2–8).

Lesson 11 therefore asks what vocation and responsibilities he gave that already-redeemed nation at Sinai. The people at the mountain are not humanity in general. They are the descendants of Jacob whom God brought out of Egypt. The earlier promise remains behind this new stage; Sinai does not begin the story again with different recipients.

Read the Primary Texts

Primary passages: Exodus 19:1–8; 20:1–21; 24:3–8; Deuteronomy 4:1–14; 28:1–68; 30:15–20.

Read the whole assigned chapter of Deuteronomy 28, including its difficult warnings. Notice who is addressed, what obedience means, and where the stated outcomes occur. Do not isolate a promise of prosperity from the covenant that gives it its setting.

Passage Structure

Exodus 19:1–8: Arrival, remembered deliverance, national vocation, and Israel’s response.
Exodus 20:1–21: God’s commandments and the people’s fear at the mountain.
Exodus 24:3–8: Spoken and written words, pledged obedience, and covenant blood.
Deuteronomy 4:1–14: Moses’ later instruction to remember, obey, and teach.
Deuteronomy 28:1–68: Blessings and curses for Israel’s covenant life.
Deuteronomy 30:15–20: The summons to choose life through loving and obeying the LORD.

Exodus narrates the Sinai events. Deuteronomy records Moses’ later address east of the Jordan, in Moab, before Israel enters the land (Deuteronomy 1:1–5). Its recollections of Horeb look backward to the mountain; its instructions for life across the Jordan look forward. Narrative, divine commands, and Moses’ covenant exhortation belong together without becoming one speech delivered on one day.

What the Texts Say

Brought to God before Being Commanded

Israel reaches the wilderness of Sinai in the third month after leaving Egypt and camps before the mountain. Moses goes up to God. The message he receives names the house of Jacob and the children of Israel as its addressees (Exodus 19:1–3).

God first recalls what they have witnessed: his action against Egypt and his carrying them to himself. The picture of eagles’ wings describes his care in bringing them out; it is figurative language within a historical account, not an invitation to turn the exodus into an allegory (Exodus 19:4).

Only then does the speech state the condition of obeying his voice and keeping his covenant. Israel is to be his treasured possession among the peoples, a kingdom of priests, and a holy nation. God’s ownership encompasses the whole earth, yet he gives this particular people a particular calling (Exodus 19:5–6).

A treasured possession belongs especially to its owner. A holy nation is set apart to God rather than available for rival worship. The priestly description concerns Israel as a nation under God. It does not say that every Israelite holds Aaron’s later office or performs the same altar duties. The detailed organization of priesthood belongs to the next lesson.

The surrounding nations remain in view. God does not choose Israel because the rest of the earth lies outside his concern. As Deuteronomy 4 will explain, Israel’s obedience is to display wisdom before other peoples. This helps clarify the national calling without inventing a missionary program not stated in Exodus 19.

Moses reports the words to the elders. The people together pledge to do what the LORD has spoken (Exodus 19:7–8). Their answer is a commitment, not a report that they have already fulfilled it. Deliverance is accomplished; covenant faithfulness must now be lived.

The Redeemer Speaks the Commandments

God identifies himself as the LORD their God who brought them out of Egyptian slavery before giving the commands (Exodus 20:1–2). That opening must govern our reading of everything that follows. The commandments address rescued Israel; they are not instructions for earning the sea crossing.

Exclusive worship comes first. Israel must have no other gods and must not make images for worship or bow down to them. God’s jealousy concerns this allegiance. The warning about successive generations belongs to the description of those who hate him, alongside his mercy toward those who love him and keep his commandments (Exodus 20:3–6). It is not a warrant for racial curses or an exhaustive theory of inherited guilt.

Israel must not misuse the LORD’s name. They must keep the Sabbath holy, with rest extending through the household to servants, livestock, and the resident foreigner. Exodus grounds this command in God’s work of creation and his seventh-day rest (Exodus 20:7–11). The command orders shared time, not merely private religious feeling.

Honoring father and mother is linked to prolonged life in the land God gives. The remaining commands prohibit murder, adultery, theft, false testimony against a neighbor, and coveting what belongs to a neighbor (Exodus 20:12–17). Covenant allegiance reaches households, bodies, possessions, speech, and desire. Worship cannot be separated from the treatment of other people.

The thunder, lightning, trumpet, and smoking mountain terrify the people. They ask Moses to speak rather than hearing God directly, fearing death. Moses tells them not to be afraid, while explaining that God’s testing is intended to establish fear of him so they do not sin (Exodus 20:18–21). The distinction is between terror that draws back and reverence that restrains sin. Moses approaches while the people remain at a distance.

Words, Pledge, and Blood

Moses reports the LORD’s words and judgments, and the people affirm obedience. He writes the words, builds an altar, and sets up twelve pillars corresponding to Israel’s twelve tribes. Young men offer burnt offerings and peace offerings of oxen (Exodus 24:3–5).

Moses puts half the blood in basins and applies half to the altar. He reads the covenant book publicly; the people again promise obedience. He then sprinkles blood on the people and identifies it with the covenant the LORD has made with them concerning these words (Exodus 24:6–8).

Ratification means formally confirming the covenant. Here that confirmation involves communicated terms, public commitment, and blood. The twelve pillars visibly identify the people bound by the covenant. Israel is not entering an undefined spiritual experience; the words have been spoken, written, heard, and accepted.

The passage names offerings, but it does not yet explain the whole sacrificial system. Nor is this scene the Lord’s Supper. Later covenant-blood language must be studied as a later development, not substituted for the historical action narrated here.

Remembering Horeb before Entering the Land

In Deuteronomy, Moses addresses Israel before entry into the land. He urges them to hear and perform the statutes so they may live and possess what the God of their fathers gives them. They must neither add to nor subtract from his commands (Deuteronomy 4:1–2).

The remembered judgment at Baal-peor makes the warning concrete: those who followed that god were destroyed, while those who held fast to the LORD remained alive (Deuteronomy 4:3–4). Moses is not offering obedience as one lifestyle among equally harmless alternatives.

Keeping these statutes will display Israel’s wisdom and understanding before the nations. Moses points to God’s nearness when Israel calls and to the righteousness of the laws he has given (Deuteronomy 4:5–8). The law is not described here as evil. It orders the life of a people whose conduct can make God’s instruction recognizable to others.

Memory must extend across generations. Israel is to guard against forgetting and teach children and grandchildren about the day at Horeb. They heard God’s voice from the fire but saw no form. God declared the covenant, identified here with the ten commandments, and wrote them on two stone tablets (Deuteronomy 4:9–14). The explicit warning against making images follows immediately outside our assigned unit, in Deuteronomy 4:15–19; the absence of a seen form supplies its stated basis.

Blessings and Curses Are Real Covenant Consequences

Deuteronomy 28 begins with diligent obedience. The blessings include fruitfulness, provision, victory over enemies, rain, and an established place among the nations as a holy people bearing the LORD’s name. City and field, households and livestock, labor and national security all appear (Deuteronomy 28:1–14).

Verse 15 introduces the opposite condition: failure to obey brings curses. The opening reversals reach the same spheres as the blessings. The chapter then describes disease, failed harvests, oppression, defeat, the removal of king and people, and siege by an invading nation (Deuteronomy 28:15–52).

The siege warnings include terrible hunger and the breakdown of family care, even the eating of children. The chapter must not be sanitized into mild disappointment. Its final movement describes diminished numbers, removal from the land, scattering among the peoples, insecurity, and a return toward Egyptian bondage in which even attempted sale finds no buyer (Deuteronomy 28:53–68).

These are national covenant sanctions that reach actual persons, families, bodies, and fields. Calling them national does not make individual suffering unreal. It identifies the covenant community and historical setting of the promises and warnings. They are not a universal formula by which every illness or financial setback today reveals an individual’s disobedience.

Moses also names failed service amid abundance: Israel would serve enemies because they did not serve the LORD joyfully when they had plenty (Deuteronomy 28:47–48). Covenant unfaithfulness is not merely a technical mistake. It concerns turning from the God who gave life and provision.

Choose Life in the Land Sworn to the Fathers

Moses concludes by setting life and good against death and evil. Loving the LORD, walking in his ways, and keeping his commands lead toward life and blessing in the land. A heart that turns away toward other gods faces destruction and shortened tenure there (Deuteronomy 30:15–18).

The appeal to choose life is immediately explained through loving God, obeying his voice, and holding fast to him. It concerns Israel and their offspring dwelling in the land sworn to Abraham, Isaac, and Jacob (Deuteronomy 30:19–20). It is not a detached slogan about choosing whatever feels life-giving.

Notice what has not disappeared: the fathers and God’s oath. Mosaic responsibility governs Israel’s covenant life in the promised land; it does not create the earlier promise. The certainty of God’s word and the seriousness of Israel’s disobedience must both remain in our reading.

How the Theme Develops

The Earlier Promise Is Not Annulled

As a later apostolic explanation, Galatians 3:17–18 explicitly distinguishes the previously ratified promise from the law that followed. The law does not annul that promise. This confirms the distinction already visible when Deuteronomy 30:20 still names the sworn land.

We must therefore avoid opposite reductions. Sinai is not a way to purchase Abraham’s promises, but neither does Abraham’s oath make Sinai’s warnings empty. The covenants have connected purposes without interchangeable terms.

The Prophets Name Covenant Breach

Jeremiah 11:1–8 recalls the covenant commands given when God brought Israel from Egypt and indicts the people for refusing to listen. Jeremiah 31:31–34 later promises a new covenant with the house of Israel and the house of Judah, distinguishing it from the covenant broken after the exodus.

These later passages prepare further study. They do not make Sinai imaginary or change its original recipients. Understanding the covenant now gives us the language needed to understand both the accusation and the promised remedy later.

Jesus and Apostolic Priestly Language

Jesus affirms love for God and neighbor as the commandments on which the Law and the Prophets depend (Matthew 22:34–40). He does not invite readers to treat Israel’s Scriptures as meaningless. Their fulfillment and the new covenant require careful study in their own place in the course.

Peter later applies royal-priesthood and holy-nation language to his hearers, connecting their calling with proclaiming God’s excellencies and honorable conduct among the nations (1 Peter 2:9–12). This is a genuine apostolic development. It does not authorize changing the addressees in Exodus 19 or claiming that God has rejected Israel; Romans 11:1–2, 28–29 expressly resists that conclusion.

The apostolic proclamation centers on Jesus the Messiah: his death for sins, bodily resurrection, exaltation, coming reign and judgment, with a summons to repentance, faith, confession, baptism, and continued discipleship (Acts 2:22–42; 17:30–31; Romans 10:8–13; 1 Corinthians 15:1–28). It is not a promise that adopting Israel’s national sanctions will guarantee present wealth.

Service in God’s Renewed Creation

Revelation describes those redeemed by the Lamb as a kingdom and priests serving God and reigning on the earth (Revelation 5:9–10). Its concluding vision retains embodied life, God dwelling with humanity, and his servants serving him (Revelation 21:1–5; 22:1–5). This later horizon develops royal and priestly service without turning Sinai’s people or land into mere symbols.

What These Texts Establish

Deliverance precedes commandments. God addresses Israel after bringing them out of Egypt (Exodus 19:4; 20:2).
Israel receives a national holy and priestly vocation with required obedience (Exodus 19:3–8).
Covenant allegiance orders worship and neighborly life (Exodus 20:3–17).
The covenant is publicly confirmed through words, commitment, and blood (Exodus 24:3–8).
Israel must remember, practice, and teach God’s righteous instruction (Deuteronomy 4:1–14).
Obedience and disobedience have stated consequences in the land sworn to the fathers (Deuteronomy 28:1–68; 30:15–20).

What These Texts Do Not Say

The commandments did not earn the exodus. The national priestly calling does not assign every Israelite the same altar office. The people’s pledge does not prove that they subsequently obeyed perfectly.

Neither the blessings nor the curses authorize a prosperity formula for every individual today. Jesus himself rejects the assumption that a particular man’s blindness must be traced to his or his parents’ sin (John 9:1–3). Covenant warnings must not become permission to accuse suffering people or despise Israel.

The Mosaic covenant does not erase the Abrahamic oath. Later priestly language does not mean that Exodus 19 originally addressed a different people. Detailed tabernacle service, land-rest, and the new-covenant meal remain later subjects rather than conclusions smuggled into these units.

Digging Deeper

Compare the movements of Exodus 19:4–6 and Deuteronomy 30:19–20. The first begins with what God has done and moves to covenant obedience; the second joins love, obedience, and holding fast to God with life in the sworn land. Neither passage separates relationship from responsibility.

Likewise, Exodus 24 joins hearing and doing. The written covenant book is read before the renewed pledge. Obedience has a disclosed object: God’s communicated words. Deuteronomy 4:2 protects that object from human additions and subtraction. Careful interpretation is therefore part of faithful hearing, not an obstacle to it.

Living within the Story

Begin with gratitude rather than imagined self-rescue. Israel did not author its deliverance, and disciples of Jesus likewise receive salvation as God’s gift rather than an achievement, while being called to good works (Ephesians 2:8–10). This is a later application of a comparable order, not an assertion that Egypt and every later experience of salvation are identical.

Let allegiance reach ordinary conduct. The commands about neighbors challenge a religion that protects its worship language while tolerating theft, dishonest testimony, or covetous desire. Identify one relationship in which truthful speech or respect for another person’s goods needs attention.

Practice patient teaching. Deuteronomy 4:9–10 calls Israel to preserve memory for children and grandchildren. Its example challenges readers to communicate Scripture accurately rather than replacing explanation with slogans. Teach what the passage actually says, including its original audience.

Finally, refuse to diagnose another person’s hardship from Deuteronomy 28. Take the warnings seriously in their covenant setting while following Jesus’ refusal of simplistic blame. Reverence should produce humility and faithful conduct, not confident accusations against sufferers.

Key Takeaways

God gave commandments to Israel after redeeming them from Egypt.
Treasured possession, kingdom of priests, and holy nation describe a responsible national calling.
The ten commandments order allegiance to God and life with neighbors.
Words, public commitment, and blood confirm the covenant with Israel.
Moses’ later Moab address teaches remembrance, obedience, blessings, and curses before entry into the land.
Mosaic sanctions remain serious without cancelling God’s earlier oath to the fathers.

Check Your Understanding

What does God recall before giving Israel its vocation in Exodus 19?
How do the settings of Exodus and Deuteronomy differ in this lesson?
How does Galatians 3:17–18 clarify the relationship between promise and law?
Why is Deuteronomy 28 not a formula for explaining every person’s suffering today?
In two sentences, explain what vocation and responsibilities God gave redeemed Israel.

Discussion and Reflection

How does redemption before commandment guard against both self-reliance and indifference to obedience?
Why must national priestly vocation be distinguished from particular priestly office?
What concrete practice would help you teach Scripture without adding to its claims?
How can we take covenant judgment seriously without using it to accuse suffering neighbors?

Further Scripture Study

Deuteronomy 1:1–5 — Identify the setting of Moses’ later instruction.
Deuteronomy 4:15–19 — Read the image warning that follows the assigned remembrance of Horeb.
Galatians 3:15–18 — Distinguish the prior promise from the later law.
Jeremiah 11:1–8; 31:31–34 — Observe covenant breach and the named recipients of the promised new covenant.
1 Peter 2:9–12 — Examine priestly language with its stated purpose and conduct.
Revelation 5:9–10; 22:1–5 — Follow priestly and royal service toward the canon’s embodied hope.

Looking Ahead

Lesson 11 shows that redeemed Israel received a national covenant vocation with commandments, blessings, and curses. Lesson 12 must now ask how the holy God could dwell among that sinful people.

Lesson 12: Tabernacle and Sacrifice: God Dwelling among Israel will examine Exodus 25:1–9; 29:42–46; 40:34–38; Leviticus 16:1–34; 17:11; 26:11–13. The next step concerns God’s provision for dwelling among Israel, not an abandonment of the people he has brought to himself.