God Keeps His Promises

Luke 1:26-38, 46-55; Matthew 1:18-25; Luke 2:1-21; John 1:1-14 December 24, 2023 Pastor Ricky Alcantar
Thesis In the manger at Bethlehem, we find a God who always keeps his promises—promises to lift the lowly, establish an eternal kingdom, welcome all peoples, and overcome darkness with light.
Series
Looking at the Manger
Type
Topical
Tone
pastoralcelebratorydidactic
Method
redemptive-historicalcanonicalapplicatory
What's in this sermon

The shape of the argument

52 units across exposition, application, illustration, theological claim, and conclusion. The pastor's argument is built from these moving parts.

Pastoral correction · unit #17
"Issues a concrete invitation to pause and meditate on the personal implications of Christ's birth before continuing to worship."
Doctrinal loci· 13 surfaced
Christology · 19 Theology Proper · 17 Soteriology · 10 Ecclesiology · 5 Anthropology · 4 Bibliology · 4 Covenant Theology · 4 Eschatology · 3 Hamartiology · 3 Doxology / Worship · 2 Pastoral Theology · 1 Pneumatology · 1 Providence / Sovereignty · 1
Bible citations· 16
Luke 1:26-38 | Luke 1:46-55 | Isaiah 57:15 | Joshua 2 | 1 Kings 17 | Ruth 1-4 | Isaiah 7:14 | Matthew 1:18-25 | 2 Samuel 7:16 | Isaiah 9:7 | Luke 2:1-7 | Micah 5:2 | Luke 2:8-21 | Genesis 12:3 | John 1:1-14 | Genesis 3:15
Illustrations· 7
  1. historical example · unit #7 — Provides Old Testament examples of lowly women whom God elevated—Rahab, Ruth, and the widow of Zarephath—as typological precedents for what Mary now experiences.
  2. historical example · unit #12 — Develops the Davidic promise by showing how Jesus embodies the virtues of good kings (David, Solomon) while purging the vices of evil kings (Ahab), culminating in the eternal King.
  3. hypothetical · unit #30 — Imagines the shepherds' response as undignified, joyful haste, contrasting worldly propriety with kingdom eagerness.
  4. personal story · unit #41 — Extended personal story about losing and finding a Christmas present in the obvious place he'd already wrapped it, serving as an analogy for the tendency to overlook what's right in front of us.
  5. personal story · unit #42 — Draws out the lesson from the lost present story: we often miss what's right in front of us because it seems too obvious to check.
  6. hypothetical · unit #45 — Contrasts human promise-breaking with divine promise-keeping by surfacing common experiences of broken promises to heighten the significance of God's faithfulness.
  7. personal story · unit #49 — Personal story of his 4-year-old son's anxiety that December 25 might not come, fearing the calendar's reliability, serving as an analogy for anxious faith.
Theological claims· 15
  1. Despite Mary's lowly state, she recognized in her newborn child the fulfillment of God's promises. unit #4
  2. In Jesus, Mary saw the fulfillment of Isaiah 57:15—God's promise to dwell with and lift up the lowly. unit #5
  3. God's pattern is to choose the humble and weak over the impressive and strong. unit #6
  4. Mary's recognition of God's pattern of lifting the lowly led her to confidence that God keeps his promises. unit #8
  5. Joseph's recognition of Jesus as the promised eternal King confirmed that God keeps his promises. unit #13
  6. Bethlehem failed to recognize the Messiah in their midst because they were looking for the wrong kind of king or were too preoccupied to look at all. unit #24
  7. God's promise-keeping does not depend on human recognition; he fulfilled his promise to send the King even when Bethlehem missed him. unit #25
  8. The shepherds experienced a dramatic reversal from exclusion to inclusion, becoming the first to be welcomed into the good news of the Messiah's birth. unit #29
  9. The shepherds recognized in Jesus the fulfillment of God's promise to Abraham to bless all nations, including those previously excluded from Israel's covenant community. unit #31
  10. The shepherds' encounter with Jesus confirmed for them that God keeps his promises. unit #32
  11. The angels recognized Jesus as the simultaneous fulfillment of the Davidic, Abrahamic, and Adamic promises, embodying the light that defeats darkness. unit #36
  12. The angels who announced Christ's birth may have foreseen that the darkness would fail to overcome him, culminating in resurrection. unit #38
  13. The angels' worship arose from their recognition that in Jesus' face, they saw the fulfillment of God's ancient promises. unit #39
  14. In the manger we find what we've been searching for: a God who always keeps his promises and will never forsake us. unit #44
  15. Unlike every other promise-breaker we've encountered, God is utterly unlike anyone else—he always keeps his promises. unit #46
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Full transcript

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0 · Introduces the sermon's controlling metaphor: viewing Christ through the eyes of different Christmas characters to see how God keeps promises from multiple perspectives

Well, today our theme is looking at the manger and seeing in the face of Jesus how God always keeps his promises. And each character in the story of Christmas sees that reflected in Jesus, but sees it from a slightly different angle, a slightly different promise kept. And so today we're going to look through their eyes and ask the Lord to give us the sight, a fresh sight, a new sight of what takes place in in the Christmas story.

1 · Full reading of the annunciation narrative from Luke 1, establishing Mary's encounter with Gabriel and the promise of Jesus' birth and eternal reign

First, what Mary saw from the Gospel of Luke, chapter 1. In the sixth month, the angel Gabriel was sent from God to a city of Galilee named Nazareth, to a virgin betrothed to a man whose name was Joseph of the house of David. And the virgin's name was Mary. And he came to her and said, Greetings, O favored one! The Lord is with you. But she was greatly troubled at the saying and tried to discern what sort of greeting this might be. And the angel said to her, do not be afraid, Mary, for you have found favor with God. And behold, you will conceive in your womb and bear a son, and you shall call his name Jesus. He will be great and will be called the Son of the Most High, and the Lord God will give him the throne of his father David. David. And he will reign over the house of Jacob forever, and of his kingdom there will be no end. And Mary said to the angel, How will this be since I am a virgin? And the angel answered her, The Holy Spirit will come upon you, and the power of the Most High will overshadow you. Therefore the child to be born will be called holy, the Son of God. And behold, your relative Elizabeth in her old age has also conceived a son, and this is the sixth month with her who was called barren, for nothing is impossible with God. And Mary said, Behold, I am the servant of the Lord. Let it be to me according to your word. And the angel departed from her.

2 · Full reading of the Magnificat, Mary's song of praise celebrating God's reversal of worldly power structures and his faithfulness to his promises to Abraham

And Mary said, My soul magnifies the Lord, and my spirit rejoices in God my Savior, for he has looked on the humble estate of his servant For behold, from now on all generations will call me blessed, for he who is mighty has done great things for me, and holy is his name. And his mercy is for those who fear him. From generation to generation he has shown strength with his arm. He has scattered the proud and the thoughts of their hearts. He has brought down the mighty from their thrones and exalted those of humble estate. He has filled the hungry with good things, and the rich he has sent away empty. He has helped his servant Israel in remembrance of his mercy, as he spoke to our fathers, to Abraham and to his offspring forever. This is God's Word.

3 · Establishes Mary's lowly social position to heighten the significance of God's choice of her—she had no worldly qualifications or power

Mary was just a girl. She was not important to any but maybe a handful of family members in a small town. She was not wealthy. She was young. She was from an oppressed people living in the shadow of the Roman Empire. She had even no standing in court. She had no earned respect among the mothers and grandmothers of the town.

4 · Pivots from Mary's lowliness to the theological claim that in Jesus' face, she witnessed the fulfillment of God's promises

And yet, on that night in Bethlehem, Mary looked at the face of her child and saw God keeping his promises.

5 · Identifies the specific promise Mary witnessed: God's declaration in Isaiah that he dwells with and revives the lowly and contrite

What did Mary see reflected? She saw Isaiah 57:15. God said, I live in a high and holy place, but also with the one who is contrite and lowly in spirit, to revive the spirit of the lowly and to revive the heart of the contrite. She saw in her child's face God keeping his promise to lift up the lowly.

Where this fits

Recent preaching context

The three sermons immediately preceding this one in the preaching schedule.

Dec 3, 2023
True contentment is found not by changing our circumstances or identity to match what we think we need, but by embracing where God has assigned us and resting in our vertical identity as those bought with the price of Christ's blood.
1 Corinthians 7:17-24
Dec 10, 2023
Because life is short and eternity is long, Christians must live with eternal perspective, recognizing that both singleness and marriage are gifts meant to serve kingdom purposes rather than ultimate sources of fulfillment.
1 Corinthians 7:25-31
December 24 · This sermon
God Keeps His Promises
In the manger at Bethlehem, we find a God who always keeps his promises—promises to lift the lowly, establish an eternal kingdom, welcome all peoples, and overcome darkness with light.
Luke 1:26-38, 46-55; Matthew 1:18-25; Luke 2:1-21; John 1:1-14
Earlier in the corpus · April 13, 2025
A prior sermon on Luke 19:28-40
You preached this same passage — 9 Luke 1 citations in that earlier sermon. Worth re-reading before the next time this text comes around.
Take it further

Discuss · apply · pray

Small-group discussion

6 questions for your group this week

  1. In Luke 1:26-38, Mary is described as a young, lowly woman from a small town—not someone the world would have chosen to birth the Messiah. What does the sermon suggest about God's pattern in choosing who will be part of his promise-keeping? Where have you seen God work through people or circumstances that seemed unlikely or humble?
    Isaiah 57:15
    → How does recognizing God's pattern of lifting the lowly change the way you see your own place in his story?
  2. Mary's song in Luke 1:46-55 celebrates that God 'has brought down the powerful from their thrones and lifted up the lowly.' What did Mary understand about God's character and his promises that gave her confidence to sing this way?
    Luke 1:46-55
  3. Joseph, a descendant of David working as a carpenter, had every reason to wonder if God had abandoned his family line. Yet in Matthew 1:18-25, he is told that Jesus will inherit David's throne forever. What would it have meant for Joseph to trust this promise when his circumstances looked nothing like royalty?
    2 Samuel 7:16
    → What promise from God are you finding hard to trust right now because your current circumstances don't seem to match it?
  4. The shepherds in Luke 2:8-21 were considered unclean and excluded from the temple and covenant community. Yet they were the first people invited to meet the Messiah. What does their inclusion reveal about God's promise to Abraham in Genesis 12:3—that through his seed, all nations would be blessed?
    Genesis 12:3
  5. The sermon notes that Bethlehem, the very town where Jesus was born, 'failed to recognize the Messiah in their midst.' What does this suggest about how we might miss God's presence or God's faithfulness in our own lives? Where might we be looking for the wrong thing?
    → What would change if you truly believed that God's promise-keeping doesn't depend on your recognition of it?
  6. In John 1:1-14, John describes Jesus as the Word who was with God and was God, yet 'the darkness did not overcome it.' How does knowing that Jesus is the fulfillment of the ancient promise from Genesis 3:15—the seed who would crush the serpent's head—shape the way you face darkness or difficulty this week?
    Genesis 3:15
Draft · pending review
Daily readings · Monday–Friday

5-day reading plan

This week, we follow five witnesses to the manger—each discovering a different facet of God's ancient promises kept in Jesus. From Mary's recognition of God's pattern with the lowly, to Joseph's confirmation of the eternal King, to the shepherds' reversal from exclusion to welcome, to the angels' proclamation of light defeating darkness—we learn that God always keeps his promises.

Monday Isaiah 57:15

The prophet Isaiah declared what Mary discovered in the manger: the God of heaven chooses to dwell not in palaces but with the contrite and humble in spirit. Mary's lowly station—a young peasant girl—was no disqualification from bearing God's promise. In Jesus, God was saying to every marginalized, small, overlooked person: I have not forgotten you. I dwell with you.

Tuesday 2 Samuel 7:16

David was promised that his throne would endure forever—a promise that seemed impossible when Joseph, a carpenter in Nazareth, was born into David's line. Yet in the child laid in the manger, God fulfilled what He spoke to David centuries before. Joseph understood: the promise had not failed. The King had come, and His kingdom would have no end.

Wednesday Genesis 12:3

When angels appeared to the shepherds—the ceremonially unclean, the excluded, the forgotten—God was remembering His ancient word to Abraham. The blessing promised to all families of the earth was being announced first not to the powerful but to the marginalized. In that moment, the shepherds became witnesses that God's promise to welcome all peoples was unfolding in flesh and blood.

Thursday Genesis 3:15

In the garden, God promised that a seed would come to crush the serpent's head—to overcome the darkness that sin unleashed. The angels, who have watched empires rise and fall, sickness ravage the earth, and death claim all people, recognized in the crying infant the very light that would defeat all darkness. Their song of glory was the song of an ancient promise finally, fully, visibly kept.

Friday John 1:1-14

John reminds us what we saw in the manger: the eternal Word, full of grace and truth, pitched His tent among us. Every promise God ever made—to lift the lowly, to establish an eternal kingdom, to bless all nations, to crush darkness—was *embodied* in that child. We often seek trustworthiness and hope everywhere else. But in the manger, we find what we've been searching for: a God who keeps every promise He makes, forever faithful, never forsaking us.

Draft · pending review
Pray together this week

A God Who Keeps His Promises

Father, we come before you this Christmas season with grateful hearts, recognizing that you are utterly unlike anyone else we know—you always keep your promises. In the manger at Bethlehem, we see the fulfillment of ancient promises made to Abraham, to David, to Adam himself. We worship you for your faithfulness across the centuries, for your willingness to dwell with the lowly and lift them up, for sending the eternal King into a dark world (John 1:1-14).

And yet, Lord, we confess that we so often seek life and hope and trustworthiness everywhere except in Christ, who has been the obvious answer all along. We look to other promises—from the culture, from our own ambitions, from voices that say they will deliver what only you can give. Like Bethlehem, we can be so preoccupied or so focused on the wrong kind of rescue that we miss you in our midst. Forgive us for our wandering hearts and our short memory of your faithfulness.

We receive afresh the good news: in Jesus, you have kept every promise. You have come down to dwell with us. You have lifted up the lowly like Mary. You have made the shepherds, the excluded and the unclean, the first witnesses of your salvation. You have sent the King whose kingdom will have no end (Isaiah 9:7). The darkness has not overcome the light, and it never will. Give us the eyes to see him as he is—the fulfillment of all we've been searching for.

We ask, Father, that this week we would live as people who have met a promise-keeper. When we are tempted to trust in lesser promises, remind us of Bethlehem. When we are afraid, help us remember that you are faithful. Give us courage to follow Jesus, the one in whom all your promises find their yes and amen. We commit ourselves to you, to your word, and to the One whose coming we celebrate. To you alone be all glory and honor, now and forever. Amen.

Draft · pending review
Sunday-evening family table

Who Did God Choose to Tell First?

For the parent

This prompt invites kids to notice whom God picked to announce Jesus' birth—not the important people, but shepherds. Let them talk about why that might matter, and what it says about who God cares about. You're listening for their sense of God's heart for the left-out.

In the sermon, we heard that the shepherds were the first people God told about Jesus being born. They weren't important people—they were left out and looked down on. Why do you think God chose to tell them first instead of the king or important people in the city? What does that tell us about Jesus and what he cares about?
works for ages 7+ — younger kids might need you to remind them who the shepherds were, but they can still answer why God choosing the left-out matters
Draft · pending review
Couples · three questions over coffee

God Keeps His Promises—Even in Our Uncertainty

  1. What promise of God did you hear about in the manger story this week that you most needed to hear—and why?
  2. In what area of your marriage right now do you find it hardest to trust that God keeps his promises, and how might that doubt be shaping the way you're relating to each other?
  3. How can we pray for one another this week to help each other believe—really believe—that the God of the manger will not forsake us?
Draft · pending review
Memory verse this week

Isaiah 57:15

For thus says the One who is high and lifted up, who inhabits eternity, whose name is Holy: 'I dwell in the high and holy place, and also with him who is of a contrite and humble spirit, to revive the spirit of the humble and to revive the heart of the contrite.'

Why this verse: This verse captures the sermon's central thesis through Mary's encounter: God's promise to lift the lowly is not a distant hope but an intimate reality—God himself dwells with the humble and contrite. It anchors the Christmas story's deepest meaning: in Jesus, we meet a God who keeps his promises by coming down to us.

Draft · pending review
Where this was preached

About the church

Cross of Grace Church
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# Cross of Grace Church

A church preaching expository sermons through the books of the Bible.

## Sermons
- [The Gift of Sex, Singleness, and Difficult Marriage (2023-11-19)](/CoGElPaso/sermons/2023/11/the-gift-of-sex-singleness-and-difficult-marriage)
- [How Can I Be Content With What I Have and Who I Am? (1 Corinthians 7:17-24, 2023-12-03)](/CoGElPaso/sermons/2023/12/how-can-i-be-content-with-what-i-have-and-who-i)
- [Should I Get Married (1 Corinthians 7:25-31, 2023-12-10)](/CoGElPaso/sermons/2023/12/should-i-get-married)
- [God Keeps His Promises (Luke 1:26-38, 46-55; Matthew 1:18-25; Luke 2:1-21; John 1:1-14, 2023-12-24)](/CoGElPaso/sermons/2023/12/god-keeps-his-promises)

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- [About the church](/about)
- [Plan a visit](/visit)

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