God’s Covenant: A Story of Amazing Grace

Opening: You already renew this covenant every week

Before we open a single page of Genesis or Exodus, consider something you already do. Most Sundays — maybe more often — you walk into a church, you hear a reading that recalls what God has already done for you, and then you gather around a table to eat and drink. You do this “in remembrance” of someone. You do it as a community, not alone. And you do it again and again, on a fixed rhythm, because the relationship needs renewing.

That is the Mass. It is also, as it turns out, the oldest pattern in the Bible for how God binds himself to his people: a covenant, renewed at a shared meal. Nothing about this session is asking you to see something foreign in your own liturgy. It is asking you to recognize what you already do every time you approach the altar — and to see how far back that pattern goes.

What a covenant actually was

In the ancient world, belonging to a family was not sentimental — it was survival. Family meant provision, protection, and identity. Scripture recognizes four ways a person could enter a family: by marriage, by birth, by adoption, and by covenant. Of these, covenant is the one that concerns us most in Revelation and in the story of Israel, because it is the door through which an entire nation became God’s family.

Ancient covenants came in two basic shapes. Some were struck between equals — a mutual alliance, where each party called the other “brother.” But the covenant that shaped Israel’s relationship with God was the other kind: a covenant between the strong and the weak, sometimes called a covenant of conquest. Here the stronger party was called “father” or “master,” the weaker “son” or “servant.” The stronger party held real authority over the weaker — but was also bound, by the covenant itself, to protect the weaker party as family. We see this play out concretely in Joshua 9–10: once Israel made a covenant with the Gibeonites, Joshua was obligated to defend them, even when it cost him and even when he might have preferred not to. A covenant, once cut, created real family obligations that ran in both directions.

Notice too: a weaker party could only belong to one covenant “father” at a time — you only have one father — while a strong nation, like a father with many children, could hold covenants with several weaker nations at once. This is exactly why Israel’s first commandment mattered so much: to have “no other gods before me” was not abstract theology. It was the basic loyalty owed by a son to his one true father. Breaking that loyalty — refusing tribute, courting other “fathers” — meant losing the inheritance: exile from the land.

Cutting a covenant

Here is something the English word “covenant” hides but the Hebrew doesn’t: to make a covenant is literally “to cut” a covenant. The phrase comes from the ceremony itself. Animals were slaughtered and cut in half, the halves laid out in two rows, and the weaker party walked between the pieces — a vivid, physical oath: may what happened to these animals happen to me if I break this word.

The reversal at the heart of Genesis 15

When God makes his covenant with Abraham in Genesis 15, the animals are cut and arranged exactly as we’d expect. But then comes the astonishing reversal: it is not Abraham who walks between the pieces. Abraham falls into a deep sleep, and it is God himself — appearing as a smoking firepot and a blazing torch — who passes through the blood alone. The stronger party takes the weaker party’s place under the curse.

This matters enormously, because Abraham does not keep his side of things perfectly — think of his impatience in fathering Ishmael through Hagar rather than trusting God’s promise. Yet the curse for covenant-breaking was never going to fall on Abraham. God had already walked through the fire in his place. What Genesis 15 anticipates, in other words, is a Father who absorbs the penalty owed by his unfaithful children. We will come back to this.

Sinai: a covenant read aloud, sealed at a meal

At Sinai, God’s covenant with Israel follows a recognizable ancient treaty pattern in five parts: a preamble naming the great King (“I am the LORD your God,” Exodus 20:2); a prologue recalling his prior kindness (“who brought you out of the land of Egypt”); demands, beginning with exclusive loyalty (Exodus 20:3–6); blessings for faithfulness and curses for unfaithfulness, escalating gradually to give Israel every chance to turn back (Deuteronomy 28, Leviticus 26); and witnesses — “heaven and earth” stand in as witnesses instead of pagan gods (Deuteronomy 30:19). Two copies of the commandments were kept and ultimately deposited in the temple, and the covenant had to be read aloud publicly and regularly — every seven years, and again at each king’s coronation (Deuteronomy 17:18–19; 31:9–13).

It’s worth pausing to say plainly: the terms of this covenant were never impossible. Israel could have kept them. God calls himself Israel’s Father (Exodus 3:6), and the word Scripture uses again and again for his covenant loyalty is hesed — a rich word that means love, goodness, mercy, and faithfulness all at once, the loyalty owed within a family.

And crucially, this covenant was not just read — it was sealed at a meal. In Exodus 24, Moses and the elders of Israel eat and drink in God’s presence on the mountain, ratifying the covenant communally, around a table.

The Last Supper: the same pattern, reaching its destination

Now look at what Jesus does at the Last Supper. He takes the Passover meal — itself Israel’s great annual covenant meal, recalling God’s deliverance from Egypt — and he reinterprets it around himself: “This is my body… this is my blood of the covenant” (echoing Exodus 24’s covenant meal precisely), and “do this in remembrance of me” (echoing Deuteronomy 31’s command that the covenant be read and renewed again and again).

This is not a new religious invention layered onto an old story. It is the oldest covenant pattern in Scripture arriving at what it was always pointing toward. Every Mass stands in that same line: a communal meal that renews the relationship between God and his people; a prologue that recalls God’s prior faithfulness (in the Eucharistic Prayer we proclaim “we announce your death, O Lord, and profess your resurrection, until you come again” — the ancient prologue, retold); and an assembly gathered around a sacrifice at its center. When you hear the priest say the words of institution, you are hearing Exodus 24 and Deuteronomy 31 spoken again, fulfilled.

And the Genesis 15 reversal — God himself walking through the fire, absorbing the curse owed to the unfaithful party — finds its full and final expression at the cross. There, God’s own Son bears the covenant curse that belonged to us, exactly as the smoking firepot in Genesis 15 already foreshadowed two thousand years earlier. The Eucharist re-presents that once-for-all sacrifice; it does not repeat it, because it does not need to be repeated. The Lamb who was slain has already walked through the fire for us.

Living this

If the Mass is a covenant renewal, then a few questions become unavoidable:

• Do I come to Mass as a covenant partner — someone renewing a real, binding relationship — or as a spectator at a ritual I don’t fully connect to the rest of my life?
• Where in my life am I tempted toward “other fathers” — other ultimate loyalties competing with the God who has bound himself to me?
• Do I let the words of the Eucharistic Prayer actually land as what they are: the retelling of everything God has already done for me, right before I receive him again?
• Where do I need to trust more deeply that Christ, not I, has already borne the cost of my unfaithfulness?

Closing

Every time you go to Mass, you are not performing a separate religious activity alongside the story of Scripture — you are standing inside its oldest pattern. Abraham’s smoke and fire, Sinai’s shared meal on the mountain, the prophets’ repeated calls to renew a broken loyalty: all of it converges at a table where bread becomes body and wine becomes blood, “the blood of the covenant.” Go to that table knowing what you are actually doing there — not just receiving comfort, but renewing the oldest, deepest promise God has ever made, sealed already, once and for all, in Christ.

For preparation

Discussion questions:

1. Before this session, had you thought of the Mass as a “covenant renewal ceremony”? How does that framing change how you might listen to the Eucharistic Prayer next time?
2. What does it mean that a covenant “father” was obligated to protect the weaker party, the way Joshua had to protect the Gibeonites? How does that shape how we think about God’s commitment to us?
3. Genesis 15 shows God taking the place of the one who deserved the curse. Where else in your own faith do you see this same pattern — the strong taking the place of the weak?
4. How does knowing the ancient treaty structure (preamble, prologue, demands, blessings/curses, witnesses) help you read the Old Testament covenants with new eyes?

Hymn suggestions:

• “Panis Angelicus”
• “Ubi Caritas”
• “At That First Eucharist” (or another hymn appropriate for the Liturgy of the Eucharist)
• “Ashes” or another hymn on covenant/renewal, if suited to the season