One Story Across Two Testaments

One of the first things a new Bible reader notices is that the Bible is divided into two major sections: the Old Testament and the New Testament. A common question follows almost immediately: Why two? Are they telling different stories? Does the Old Testament still matter now that we have the New? These are good questions, and they deserve a full answer, because the relationship between the two Testaments is one of the most important things you can understand about the Bible.

The short answer is this: the Old Testament and the New Testament are not two separate stories. They are two parts of one continuous story. The Old Testament sets the stage, establishes the promises, and creates the expectation. The New Testament shows the fulfillment of what the Old Testament promised and points forward to what is still to come. You cannot fully understand the New Testament without the Old, and you cannot see the Old Testament's deepest meaning without the New. They belong together.

Let us trace the broad shape of that one story. It begins with creation. God made the heavens and the earth, and everything in them, and declared it good. The opening chapters of Genesis give us the world as God intended it. But the story does not stay there. Humanity sinned, and that sin fractured the relationship between God and the people He had made. The rest of the Bible is the account of what God did in response to that fracture, not because He was obligated to, but because He is a God of mercy, faithfulness, and purpose.

From the wreckage of the fall, God began to work through a specific people. He called Abraham, made a covenant with him, and promised that through his descendants all the nations of the earth would be blessed. From Abraham came Isaac, from Isaac came Jacob, and from Jacob came the twelve tribes of Israel. The books of Genesis, Exodus, Leviticus, Numbers, and Deuteronomy trace the early history of this people: their slavery in Egypt, their deliverance under Moses, the giving of the Law at Sinai, and their journey toward the land God had promised them.

After Moses came Joshua, who led Israel into the promised land. Then came the period of the judges, then the kings, beginning with Saul and continuing with David and Solomon. The books of Joshua, Judges, Ruth, 1 and 2 Samuel, and 1 and 2 Kings carry this history forward. Through it all, God was patient with a people who repeatedly turned away from Him, and He continued to speak through prophets who called the nation back to faithfulness and declared what He intended to do.

The prophets are among the most important voices in the Old Testament. They spoke during the periods recorded in the historical books. Isaiah, Jeremiah, Ezekiel, and the twelve shorter prophetic books all belong somewhere in that history. They did not simply predict the future in isolation. They addressed real situations, real kings, and real crises. But woven through their words were promises that reached far beyond their own time: a coming deliverer, a suffering servant, a new covenant, a kingdom that would never end.

All of that expectation and promise converges on Jesus Christ. The New Testament opens with four accounts of His life, ministry, death, and resurrection. Matthew, Mark, Luke, and John each present Jesus from a distinct perspective, but they are telling the same story about the same person. After His resurrection and ascension, the Holy Ghost was poured out on His followers, and the church was born. The book of Acts records the spread of the gospel from Jerusalem outward into the surrounding world. As the church grew, letters were written to congregations and individuals, addressing questions, correcting problems, and establishing believers in the faith. The New Testament closes with the book of Revelation, which sets before God's people the hope of what is still to come: the return of Christ, the final judgment, and the renewal of all things.

This is the map of the story. It is important to understand that this map is not the same as the order in which the books appear in your Bible, nor is it the order in which they were written. The books of the Bible are arranged by type and section, not strictly by the sequence of events they describe. Chronicles, for example, revisits portions of the history already told in Samuel and Kings. The prophets spoke during periods recorded in the historical books, but they appear in a separate section of the Bible. Keeping the story's sequence in mind will help you locate each book within the larger narrative even when its placement on the shelf seems puzzling.

Now let us give proper attention to the word testament. A testament is a covenant, an agreement or binding commitment between parties. The Old Testament is built around the covenant God made with Israel at Sinai, with its laws, its priesthood, its sacrifices, and its promises. The New Testament is built around the new covenant established by Jesus Christ through His blood, which Jeremiah had prophesied centuries earlier: "Behold, the days come, saith the LORD, that I will make a new covenant with the house of Israel, and with the house of Judah" (Jeremiah 31:31, KJV). Jesus Himself, at the Last Supper, took the cup and said: "This cup is the new testament in my blood, which is shed for you" (Luke 22:20, KJV). The word testament is not a casual label. It points to a covenant relationship between God and His people.

Christians need the Old Testament for reasons that go far beyond historical curiosity. The Old Testament introduces the concepts that the New Testament assumes you already know. What is a sacrifice, and why does it matter? What is a priest, and what does he do? What is a temple, and what does it represent? What is the significance of the Passover lamb? What did God promise to Abraham, to David, and to the prophets concerning Israel and the nations? Without the Old Testament, the New Testament's explanations of what Jesus accomplished will remain partially opaque. When the writer of Hebrews explains that Christ is our great high priest, or when Paul argues that believers are Abraham's seed, those arguments are built on an Old Testament foundation. A reader who does not know that foundation will miss the depth of what is being said.

The Bible's story also involves different groups of people, and keeping them distinct will prevent a great deal of confusion. Israel, also called the Jews, is the covenant people of the Old Testament, descended from Abraham through Isaac and Jacob. The Gentiles, or the nations, are everyone outside of Israel. The church is the body of believers in Jesus Christ, composed of both Jewish and Gentile believers, brought together through the gospel. These distinctions matter when you are reading. A command first spoken to Israel must be understood in that setting before you ask what it means for you today. A letter written to a church in Corinth or Ephesus was addressed to a specific community in a specific situation. A passage first addressed to someone else can still teach you about God's character, His ways, and His purposes, but you need to know who it was originally addressed to before you can rightly apply it to yourself.

Some of the New Testament's most powerful arguments assume a detailed knowledge of Jewish history and worship. When Paul writes to the Romans about justification, he is arguing with an audience that knows the Law of Moses and the history of Abraham. When the writer of Hebrews compares the old covenant priesthood with the priesthood of Christ, he assumes readers who understand the Levitical system. A Gentile reader in any century, including our own, may need that Old Testament background in order to follow the argument fully. This is not a weakness in the text. It is an invitation to know the whole Bible, not just the parts that feel immediately familiar.