Many people realize today is Halloween—but far fewer remember that it is also Reformation Day.

On October 31, 1517, a German monk named Martin Luther posted his Ninety-Five Theses on the door of the University of Wittenberg. His goal was simple: to spark a theological discussion about the abuse of indulgences within the church. What he could not have known was that this single act would become the catalyst for the Protestant Reformation, a gospel awakening that would reshape the church and influence the world for centuries to come.

In the years that followed, the Reformation called believers back to the authority of God’s Word and the sufficiency of Christ’s finished work. It was a movement of renewal—pressing the church to rediscover the heart of the gospel and to reform its worship, doctrine, and daily life.

At its center were the Five Solas—the guiding principles that still anchor a faithful understanding of the gospel today:

• Sola Scriptura — Scripture alone is our final authority.
• Sola Gratia — Grace alone is the source of our salvation.
• Sola Fide — Faith alone is the means by which we receive it.
• Solus Christus — Christ alone is our only Mediator and Redeemer.
• Soli Deo Gloria — To the glory of God alone is the purpose of all things.

These truths not only shaped history—they must guide our lives and our church today. The Reformation reminds us to keep the gospel central, the Bible open, and our hearts fixed on Christ.

Take a few minutes today to reflect on the historical and spiritual impact of the Reformation and how it continues to shape the church’s mission in spreading the gospel of Jesus Christ.

I’ve included a few helpful links below to learn more about this significant day and its lasting importance.

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What Is the Reformation All About? – Ligonier MInistries

Are the Five Solas Biblical? – Southern Seminary