The New Testament: a story fulfilled

🎯 Objectives

By the end of this lesson you will be able to:

explain why the New Testament is the fulfilment of the Old and not a separate book;
recognize the different ways in which the New Testament quotes and echoes the Old;
understand that Israel and the Church are part of one single story of the people of God.

📖 Receive

Read these three verses slowly. They are like three doors into the New Testament:

“But when the fulness of the time was come, God sent forth his Son, made of a woman, made under the law,” — Galatians 4:4 (KJV)

“The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.” — Mark 1:15 (KJV)

“Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil.” — Matthew 5:17 (KJV)

Notice how often the idea of fulfilment returns: a time that comes to maturity, a promise that comes true.

🔍 Examine

A second half, not a new film

Imagine walking into the cinema halfway through a film. You see the characters, you sense there is tension, but you miss why that scene matters so much. Many Christians read the New Testament like this: they start with Matthew and immediately find a long genealogy full of ancient names, quotations from the prophets, references to Moses and David.

The New Testament is not a new film. It is the second half of a story that began in Genesis. Matthew’s very first words say so: Jesus is introduced as the son of David and the son of Abraham (Matthew 1:1). In a single sentence the evangelist recalls two great promises of God: a blessing for all nations through Abraham, and an eternal king from David’s line.

27 books, one single message

The New Testament gathers 27 books: four Gospels, the Acts of the Apostles, twenty-one letters and Revelation. They were written by different authors, in different places and years, for different readers. And yet at the center there is one single message, the gospel, that is, the “good news” of Jesus Christ (Mark 1:1).

This table helps you see at a glance how the 27 books are organized. Keep it handy: we will use it throughout the course.

Group	Books	What they tell
Gospels (4)	Matthew, Mark, Luke, John	The life, death and resurrection of Jesus
History (1)	Acts of the Apostles	The birth and spread of the Church
Letters of Paul (13)	From Romans to Philemon	Teaching and pastoral care for churches and co-workers
Other letters (8)	Hebrews, James, 1-2 Peter, 1-2-3 John, Jude	Encouragement and warnings for scattered believers
Prophecy (1)	Revelation	The final victory of Christ and the new creation

Paul sums up this message in a few lines: Christ died for our sins, was buried and rose again on the third day, according to the Scriptures (1 Corinthians 15:3-4). That “according to the Scriptures” is decisive. For the apostles, the death and resurrection of Jesus are not an unexpected plot twist: they are the destination of what God had announced.

What remains valid in the Old Testament?

If Jesus fulfils the Law, what becomes of the commandments of the Old Testament? We can say that the Old Testament keeps all its authority, but that not all its provisions apply to us in the same way.

📌 Authority and audience

A traffic officer raises a hand and stops a car in front of you. You recognize the officer’s authority, but you don’t stop, because the signal wasn’t meant for you. You know, though, that if you were in that driver’s place, you would have to stop too.

In the same way, all Scripture is the Word of God (2 Timothy 3:16), but some rules were addressed to Israel in a specific situation. To apply them today we look for the principle they expressed and live it in the light of Christ.

In the New Testament we see all this in action. Some commandments are confirmed, such as “love your neighbor” (Leviticus 19:18; Matthew 22:39). Others are deepened: Jesus takes the commandment against adultery all the way to the thoughts of the heart (Matthew 5:27-28). The sacrifices and the rules of the Temple, instead, were figures that pointed to Christ and find their fulfilment in him (Hebrews 10:1). Jesus is the final interpreter of the Law.

How the New Testament quotes the Old

If you read carefully, you will notice that the Old Testament is present on almost every page of the New. But not always in the same way:

direct quotations, often introduced by formulas such as “that it might be fulfilled” or “it is written”;
allusions, when the author takes up some words or an image without saying where they come from;
echoes, lighter references that a first-century Jewish reader would catch immediately.

There is another important detail. Many New Testament authors quote the Old from the Septuagint, the Greek translation of the Hebrew Scriptures that circulated throughout the Mediterranean world. For many first-century believers it was the Bible “in everyday language”. That is why a quotation in the New Testament sometimes sounds a little different from the verse you find in the Old Testament of your Bible, which is translated from the Hebrew.

An example: the “royal priesthood”

At Mount Sinai God tells Israel that it will be for him a kingdom of priests and a holy nation (Exodus 19:5-6). Centuries later Peter writes to believers scattered across Asia Minor, many of whom were not Jewish, and calls them a chosen generation, a royal priesthood, a holy nation, a people for God’s own possession (1 Peter 2:9).

Peter is not inventing a new title. He is telling the believers: “The calling God gave to Israel is now being fulfilled in you too, through Christ.” The same language returns in Revelation 1:6. If you don’t know Exodus 19, you read 1 Peter 2:9 as a beautiful sentence; if you know it, you discover a bridge built between the two Testaments.

One people of God

Finally, the New Testament speaks to us of one people of God. Under the Old Covenant, belonging to the people came mainly through descent and the covenant with Israel. Under the New Covenant you enter by faith in Christ. But these are not two different stories: Paul explains that Christ has made the two peoples, Jews and Gentiles, into one (Ephesians 2:14).

In Romans 11 Paul uses the image of an olive tree: believers who are not Jewish are branches grafted onto an ancient tree, whose roots are the promises made to the fathers. Jesus himself says that salvation is of the Jews (John 4:22). We Gentiles do not replace Israel: we are welcomed into the history of salvation that God had begun with Israel.

🔗 Connect

The link between the two Testaments runs through the whole Bible:

Genesis 12:3: God promises Abraham that in him all the families of the earth will be blessed. Paul sees in this promise the announcement of the Gospel to the nations (Galatians 3:8).
2 Samuel 7:12-16: God promises David a descendant who will reign forever. The angel announces to Mary that her son will receive the throne of David (Luke 1:32-33).
Jeremiah 31:31-34: the prophet announces a new covenant; at the Last Supper Jesus speaks of the cup of the new covenant in his blood (Luke 22:20).
Luke 24:44: the risen Jesus says that everything written about him in the Law of Moses, the Prophets and the Psalms had to be fulfilled.

The thread is always the same: God promises, God fulfils. The diagram below lines up the three promises you have just read and shows how they all converge in Christ:

flowchart LR
  A["Abraham: a blessing for the nations"] --> G(["Jesus Christ"])
  D["David: a king forever"] --> G
  J["Jeremiah: a new covenant"] --> G
  G --> C["One people of God"]

The New Testament shows us the fulfilment; the Old helps us understand how great it is.

🙏 Apply

Take a few minutes, on your own or with your group:

Have you ever read the New Testament as if it were a book on its own? What changes if you read it as the “second half” of the same story?
Choose a New Testament passage you know well and, using the notes in your Bible, check whether it quotes or echoes the Old Testament. What does that connection add?
What does it mean to you to know that you have been “grafted” into a story that began with Abraham?
Thank God in your own words because he is a God who keeps his promises, even when it takes centuries.

📚 Go Deeper

Read Matthew 1:1-17 without skipping the names: note which Old Testament figures you recognize.
Read Romans 11:11-24 and pause on the image of the olive tree.
If you haven’t done it yet, take the free course How to Study the Bible: the lesson on the Connect step will help you read every passage in the light of the whole of Scripture.

In the next lesson we will open a page that our Bibles leave blank: the four hundred years between Malachi and John the Baptist, a period that was anything but silent.