Exploring the Origins of the New Testament Canon and Other Biblical and Theological Issues

κανών, kanōn: rule or standard; collection of biblical books.

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Our Exciting New Book for Christian Parents

Every parent feels it. They know they should be studying the Bible with their children and just don’t know how to take the next step. So, the years tick away and the guilt piles up. And it’s not just the problem of being too busy. For many parents, they just don’t know where to begin.

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Does the World Notice When Christians Fight with One Another?

In the earliest centuries of the church, the burgeoning Christian movement had its fair share of critics. And their complaints were wide and varied. Christians worshipped a criminal crucified by the Romans. Christians were a threat to the empire because of their refusal to pay homage to the gods. Christian books were filled with errors...

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Two New Volumes on Christianity in the Second Century

For those regular readers of this blog (or my books), you will know that my research has focused largely on the second century of early Christianity. It is a forgotten century of sorts. Much attention is paid to the first century (for obvious reasons!), and by the time the third and fourth centuries roll around,...

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What Do Miniature Codices Tell Us About Early Christianity? #4

Early Christians Had a High View of Their Books

Before the holiday season kicked in, I began a new 5-part series exploring what the phenomenon of miniature codices teaches us about the early Christian movement. This series is designed to draw out some practical implications (for a lay audience) from my new book with Oxford University Press, Miniature Codices in Early Christianity. Having already...

January 5, 2026

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Does the World Notice When Christians Fight with One Another?

In the earliest centuries of the church, the burgeoning Christian movement had its fair share of critics. And their complaints were wide and varied. Christians worshipped a criminal crucified by the Romans. Christians were a threat to the empire because of their refusal to pay homage to the gods. Christian books were filled with errors...

March 2, 2026

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Two New Volumes on Christianity in the Second Century

For those regular readers of this blog (or my books), you will know that my research has focused largely on the second century of early Christianity. It is a forgotten century of sorts. Much attention is paid to the first century (for obvious reasons!), and by the time the third and fourth centuries roll around,...

January 19, 2026

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Ancient Manuscripts

What Do Miniature Codices Tell Us About Early Christianity? #4

Early Christians Had a High View of Their Books

Before the holiday season kicked in, I began a new 5-part series exploring what the phenomenon of miniature codices teaches us about the early Christian movement. This series is designed to draw out some practical implications (for a lay audience) from my new book with Oxford University Press, Miniature Codices in Early Christianity. Having already...

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December 1, 2025

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What Do Miniature Codices Tell Us About Early Christianity? #3

Early Christians Were Travelers

As I mentioned in a prior post, I am in the middle of a new 5-part series exploring what the phenomenon of miniature codices teaches us about the early Christian movement. This series is designed to draw out some practical implications (for a lay audience) from my new book with Oxford University Press, Miniature Codices...

November 3, 2025

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What Do Miniature Codices Tell Us About Early Christianity? #2

Christians Engaged in Private Reading More Than We Thought

As I mentioned in a prior post, I am in the middle of a new 5-part series exploring what the phenomenon of miniature codices teaches us about the early Christian movement. This series is designed to draw out some practical implications (for a lay audience) from my new book with Oxford University Press, Miniature Codices...

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A Vast Collection of Resources

Explore a wide range of resources on the origins of the New Testament, and other theological issues

About Dr.
Michael J. Kruger

Welcome to the website of Michael J. Kruger, the Samuel C. Patterson Chancellor’s Professor of New Testament and Early Christianity at Reformed Theological Seminary.

Featured Content

The Real Story Behind the Protestant Bible

When did Christians first recognize the biblical canon and how do we know we have the right books? On the Sean McDowell Show, Dr. Michael Kruger unpacks what “canon” means, why recognition began far earlier than the 4th century, and how both intrinsic factors (covenant, apostles) and extrinsic factors (heretics like Marcion) shaped the process.

A Brief Defense of a Self-Authenticating Canon

Michael Kruger challenges the modern assumption that the Bible was chosen arbitrarily. With clarity and care, he explores the historical, theological, and cultural evidence that the canon wasn’t imposed, but emerged within the early Christian community.

The Truth About the Bible and Early Christianity

‪Wes Huff, Michael Kruger, and Daniel Wallace join Michael Horton for a roundtable discussion on textual criticism, the reliability of the New Testament manuscripts, Gnosticism, the divinity of Christ, the canon, and early Christian origins.

Our Exciting New Book for Christian Parents

Does the World Notice When Christians Fight with One Another?

Two New Volumes on Christianity in the Second Century

What Do Miniature Codices Tell Us About Early Christianity? #4

What is the Real Meaning of Christmas? A Wonderful New Kids Book Provides the Answer!

What Do Miniature Codices Tell Us About Early Christianity? #3

Latest Books

Miniature Codices in Early Christianity

This volume is the first full-length monograph on the phenomenon of the miniature codex, offering a framework for distinguishing miniature codices from other tiny texts (e.g. amulets), exploring their practical and iconic functions, and, perhaps most importantly, assembling a detailed catalogue of all known Christian and Greek miniature codices. This distinctive book format provides an essential window into the textual, literary, and visual culture of early Christianity, shedding fresh light on how and why Christians were considered people of the book.

Latest Books

5 Things to Pray for Your Spouse: Prayers That Change and Strengthen Your Marriage

A happy and healthy marriage is one of God’s sweetest gifts to us. And one of the best ways to nurture that is through the power of prayer. This guide will help you to pray bold, Scripture-based prayers for your husband or wife that will strengthen and enrich your marriage. It covers 21 prayer themes, with each one including five prayer prompts from a particular passage of Scripture. You’ll be equipped to pray deep and effective prayers for your spouse’s character and spiritual walk, for your life together as a couple and through challenging seasons.

Latest Books

Surviving Religion 101: Letters to a Christian Student on Keeping the Faith in College

For many young adults, the college years are an exciting period of self discovery full of new relationships, new independence, and new experiences. Yet college can also be a time of personal testing and intense questioning― especially for Christian students confronted with various challenges to Christianity and the Bible for the first time. Drawing on years of experience as a biblical scholar, Michael Kruger addresses common objections to the Christian faith―the exclusivity of Christianity, Christian intolerance, homosexuality, hell, the problem of evil, science, miracles, and the reliability of the Bible.

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