When you hold the Bible in your hands, it can feel like a very thick and complicated book. Some of us may know certain parts well—the Gospels, the Psalms, the parables of Jesus—but there are whole sections that feel foreign or confusing. What’s the difference between Judges and Kings? Why do we have so many prophets, and why do they sometimes sound like they’re repeating one another? And what on earth does Ecclesiastes have to do with anything?

The truth is, the Bible isn’t a single book written in one go, but a library. Over a thousand years of history, God’s people collected and treasured these writings because they came to recognise them as inspired. Yet this library isn’t chaotic. From early on, the Scriptures were grouped into recognisable sections.

In Jewish tradition, the Hebrew Bible is divided into three parts: the Law (Torah), the Prophets (Nevi’im), and the Writings (Ketuvim). In the Christian tradition, what the Jews call the Writings has usually been divided into two further categories—History and Wisdom—for the sake of clarity. That is why Catholic Bibles today are normally arranged in four divisions: Law, History, Wisdom, and Prophets.

Once you see this fourfold structure, the Bible makes much more sense. Even better, we notice that the New Testament is shaped in a parallel way, showing us that the story of Israel finds its fulfilment in Christ and His Church.

And if this all feels daunting, there are great helps today. Many parishioners will know about Fr Mike Schmitz’s Bible in a Year podcast. What he does so well is walk us through the whole story step by step, showing how the pieces fit together. When we hear the readings explained in their order and context, the four divisions we’re about to explore begin to shine more clearly.

The Bible, in the end, is not just a library—it is our family album. It tells the story of where we come from, who we are, and where we are going. Just as we might open an album and see old photographs of grandparents and cousins, so here we open the pages and meet Abraham, Moses, David, Mary, Peter, Paul. They are our family in faith. This is our story.

So let’s take a walk through the four divisions of the Old Testament, and then notice how they reappear in the New. Along the way, I’ll try to show why this matters for us here and now—not as an academic exercise, but as something that speaks to our daily Christian life.

1. The Law – Our Foundation

The first five books of the Bible—Genesis, Exodus, Leviticus, Numbers, Deuteronomy—are known as the Law, or the Torah, or the Pentateuch. They lay the foundation.

Here we find the great beginnings: God creating the world, calling Abraham, freeing Israel from slavery in Egypt, making covenant at Sinai, giving the Ten Commandments. We see God teaching His people how to live with Him and with each other, how to worship, how to structure their lives.

In many ways, the Law answers the question: Who are we? Israel is not just a random tribe, but God’s chosen people, bound to Him in covenant love.

Now look at the New Testament. What stands at the start? The Gospels. Matthew, Mark, Luke, and John lay the foundation of our Christian identity. They tell us who Jesus is, what He did, what He taught, how He gave His life for us and rose again. Just as the Law established Israel, the Gospels establish the Church.

The early Fathers of the Church noticed the parallel. Saint Irenaeus, in the second century, said there could only ever be four Gospels, because the good news of Christ is for the four corners of the world—it goes everywhere, it speaks to everyone.

For us, this means that the Gospels are not optional extras. They are our daily bread. If you want to know what Christianity is about, you don’t start with the Catechism or a theology manual. You start with Matthew, Mark, Luke, and John, just as Israel started with Genesis through Deuteronomy.

I sometimes tell people: if your Bible is gathering dust, start with one chapter of a Gospel each day. It’s the surest way to build your faith on rock, not sand.

2. The Historical Books – The Story of God’s People

After the Law come the Historical Books. These include Joshua, Judges, Ruth, Samuel, Kings, Chronicles, Ezra, Nehemiah, and the Maccabees. They tell the story of Israel entering the promised land, living under judges and then kings, suffering exile, and returning.

Here we see faith lived out in history. The promises of God are not just abstract—they have to be worked out in battles, decisions, failures, and triumphs. Israel learns the hard way that obedience brings blessing, while turning from God leads to disaster.

In the New Testament, this division is echoed in the Acts of the Apostles. Acts is the history book of the early Church. It begins with Pentecost, shows us the bold preaching of Peter, the missionary journeys of Paul, the struggles and growth of the young Christian communities.

Just as the Old Testament’s history books show Israel trying to live out the Law in a real land, with real challenges, so Acts shows the Church trying to live out the Gospel in a world that is often hostile.

For us today, the lesson is simple but searching: faith isn’t lived in theory, it’s lived in time and space. It matters what we do with our days, our money, our choices, our relationships. Christianity is not an idea floating above life—it is a history we are part of, a story still being written. The Acts of the Apostles doesn’t really end; it’s as if the pen is still moving, and we are chapters in that ongoing story.

3. The Wisdom Books – The Heart’s Response

Next come the Wisdom Books: Job, Psalms, Proverbs, Ecclesiastes, Song of Songs, Wisdom, Sirach. These are very different from the first two divisions. They don’t tell a story or lay down laws. Instead, they give voice to the heart.

Here we find Israel at prayer, singing psalms of praise or lament. Here we find reflections on the meaning of life, the mystery of suffering, the search for wisdom, the beauty of love. These books are timeless; they speak to the human condition in every age.

In the New Testament, we can see a kind of parallel in the Epistles—the letters of Paul, Peter, James, John, Jude, and the Letter to the Hebrews. These writings are not stories but reflections, prayers, encouragements, practical advice. They teach us how to live as Christians day to day, how to pray, how to love, how to persevere.

Saint James’s letter, for instance, sounds very much like the Proverbs of the Old Testament—short, sharp sayings about faith and works, tongue and speech, patience and endurance. Paul’s letters, meanwhile, combine teaching with doxology, bursting into song at the greatness of God.

Why does this matter for us? Because we need wisdom as much as we need story. It’s not enough to know the facts of salvation history; we also need to let those facts shape our inner life. We need words to pray, words to ponder, words to guide us when life is confusing.

If you ever wonder where to go when you don’t know how to pray, the Psalms are always there. If you wonder how to apply the Gospel in a practical way, the Epistles are waiting.

4. The Prophets – God’s Living Voice

Finally, the Old Testament ends with the Prophets: Isaiah, Jeremiah, Ezekiel, Daniel, and the twelve minor prophets from Hosea to Malachi. These are not fortune-tellers but God’s messengers. They call Israel back to faithfulness, denounce injustice, comfort the afflicted, and above all, point forward to the coming Messiah.

The prophets are unsettling. They remind us that religion is not about going through the motions but about living faithfully in covenant with the living God. They strip away hypocrisy and complacency. They also lift our eyes to the future, giving hope that God will act decisively.

In the New Testament, this prophetic division is echoed most clearly in the Book of Revelation, the Apocalypse of John. Like the prophets, Revelation speaks in visions and symbols. It unmasks the powers of evil and assures us that Christ is victorious. It warns the complacent, consoles the persecuted, and points us to the final fulfilment when God will be all in all.

But prophecy in the New Testament is not limited to Revelation. Jesus Himself is the Prophet, the Word made flesh. His preaching, His parables, His woes against hypocrisy, His promises of the Kingdom—all continue the prophetic tradition. The apostles too speak prophetically, interpreting the signs of the times.

For us today, this is crucial. We need prophetic voices. Not people inventing new religions, but people who, like Isaiah or John, can help us see the world as God sees it, can call us to repentance, can encourage us to hope. We need to hear that Christ is victorious, even when the news is bleak, even when the Church feels weak.

Why This Structure Matters

So the Bible is not a jumble. It has a deep structure:

• Law → Gospels
• History → Acts
• Wisdom → Epistles
• Prophets → Revelation

And this structure tells us something about our own lives of faith.

• We need Law: a foundation, a covenant, an identity. For us, that’s the Gospels, where Jesus shows us who we are and whose we are.
• We need History: a story that unfolds in time, with successes and failures, to remind us that God works in the mess of real life. That’s Acts, but also the ongoing life of the Church.
• We need Wisdom: words to pray, reflections to guide, encouragement for the journey. That’s the Epistles and the Psalms.
• We need Prophets: voices that wake us up, comfort us, challenge us, point us forward. That’s the Prophets of old, and Revelation, and above all Christ Himself.

This is not just a way of organising the Bible. It is a way of understanding the Christian life. Each of us needs all four dimensions.

If our faith is only Law, we risk becoming rigid. If it’s only History, we risk becoming nostalgic. If it’s only Wisdom, we risk floating away in abstractions. If it’s only Prophecy, we risk chasing dreams. But when all four are together, our faith is balanced, strong, and whole.

What this means for us

So what can we do with this?

First, don’t be afraid of the Old Testament. See it as the preparation for Christ, and see how it already anticipates the New. When you read Exodus, think of the Gospels. When you read Joshua or Kings, think of Acts. When you pray the Psalms, remember the Epistles. When you hear Isaiah, think of Revelation.

Second, let your own spiritual reading reflect this balance. Maybe in one season you focus on a Gospel; in another, you pick up Acts; in another, you pray with the Psalms or Proverbs; in another, you read a prophet. Over time, you will taste the whole banquet God has spread before us. And for those who want a guide through it all, Bible in a Year is a wonderful companion, leading you from Genesis to Revelation in a way that makes the whole sweep of salvation history clear.

Third, see yourself as part of this ongoing story. The Bible is not just about people long ago. It is about us. We are the people formed by the new Law of Christ, living our history in the Church, seeking wisdom through prayer and teaching, listening to God’s prophetic voice today.

Saint Augustine put it beautifully: “The New Testament lies hidden in the Old, and the Old is unveiled in the New.” That means the Bible is not two stories, but one story—the story of God and His people, completed in Christ.

Ultimately, the four divisions of Scripture are not dusty categories. They are living streams that meet in the river of Christ. If you let yourself drink from each of them, your faith will grow strong and deep. And you will discover that this ancient library is in fact a single love-letter from God to His people, and that you are part of the story it tells.