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Bible studies, church history, systematic theology, and Christian apologetics by Dr. Peter J. Carter, D.Min.

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Category: Systematic Theology

Dive into the organized study of Christian doctrines, including the nature of God, the Trinity, creation, and the church. Understand how biblical teachings form a cohesive system of faith

Justification vs. Sanctification: A Critical Distinction

Posted on December 12, 2025March 16, 2026 by Dr. Peter J. Carter

Justification is a legal declaration; sanctification is ongoing transformation. When conflated, assurance is undermined and grace obscured. Understanding the Reformed distinction.

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Lesson 15: Law and Gospel in Galatians

Posted on December 8, 2025March 16, 2026 by Dr. Peter J. Carter

What is the relationship between the law and the gospel? Explore Galatians 3:15-29 to understand the purpose of the law, the law as tutor, and freedom in Christ.

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Catholic Validity vs. Liceity: The Eucharist Question Explained

Posted on December 5, 2025March 16, 2026 by Dr. Peter J. Carter

Understanding the Catholic Canon Law distinction between validity and liceity in the Eucharist, the indelible mark of Holy Orders, and a Protestant assessment.

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Three Views on the Lord's Supper: Transubstantiation, Consubstantiation, and the Memorial View

Posted on November 12, 2025March 16, 2026 by Dr. Peter J. Carter

Explore the three major Christian views on the Lord's Supper -- transubstantiation, consubstantiation, and the memorial view -- and why the symbolic position best honors the finished work of Christ.

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Understanding Justification by Faith

Posted on October 8, 2025March 16, 2026 by Dr. Peter J. Carter

At the heart of the gospel stands a doctrine that changed the world: justification by faith alone in Christ alone. Understand what Paul meant and why it still matters.

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Restoring What Was Lost: The Work Started on Calvary (Part 4 of 16)

Posted on November 3, 2024March 16, 2026 by Dr. Peter J. Carter

Series: Restoring What Was Lost, Part 4 of 16 Scripture Text: John 19:30 For three weeks, we have surveyed the damage. We have examined the inheritance Adam forfeited, the slavery into which humanity was sold, and the illegitimate rule of Satan over this fallen world. The picture has been grim, and intentionally so. You cannot...

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Restoring What Was Lost: Satan Is a Squatter (Part 3 of 16)

Posted on October 27, 2024March 16, 2026 by Dr. Peter J. Carter

Series: Restoring What Was Lost, Part 3 of 16 Scripture Texts: Genesis 3:17-19; Luke 4:6 Over the past two weeks, we have traced humanity’s fall from two vantage points: first, the forfeiture of Adam’s inheritance, and second, the selling of humanity into slavery to sin. But there is a third dimension to the catastrophe of...

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Restoring What Was Lost: Adam Sold Humanity to Be the Slave of Sin (Part 2 of 16)

Posted on October 20, 2024March 16, 2026 by Dr. Peter J. Carter

Series: Restoring What Was Lost, Part 2 of 16 Scripture Text: Romans 3:23 Last week we began our series by examining the inheritance that Adam forfeited in the Garden of Eden, a stewardship over all the earth, lost through disobedience. But the consequences of Adam’s fall did not stop at the loss of property. Something...

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About the Author

Dr. Peter J. Carter

Dr. Peter J. Carter is a theologian, author, and the founder of Theology in Focus. He holds a D.Min. with a concentration in theology and apologetics and has spent over two decades teaching, preaching, and writing to make theology accessible to every believer.

His work bridges the gap between the academy and the church, bringing rigorous scholarship to the service of faith. He is the author of several books on systematic theology and church history.

Learn more about Dr. Carter

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  • Already Judged: Why John 3:17-18 Cannot Be Reduced to a 'Do Better' Gospel
  • Guided by Elimination: What Paul's Closed Doors Teach About Divine Guidance
  • The Holiness of God and the Death of Uzzah
  • Saved by Faith Alone, But Not by a Faith That Is Alone
  • Who Gets to Select? The Problem of Selective Patristic Citation

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Popular Posts

  • Already Judged: Why John 3:17-18 Cannot Be Reduced to a 'Do Better' GospelMay 3, 2026
  • Guided by Elimination: What Paul's Closed Doors Teach About Divine GuidanceApril 21, 2026
  • The Holiness of God and the Death of UzzahApril 21, 2026
  • Saved by Faith Alone, But Not by a Faith That Is AloneApril 6, 2026
  • Who Gets to Select? The Problem of Selective Patristic CitationMarch 31, 2026

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