Faith Simplified

What We Believe and Why We Believe It

Available May 20, 2025

Curiosity Welcomed

A Clear and Concise Explanation of Christianity

The Christian faith has incredible life-changing power. And yet too many people—Christians included—know too little about it. The more we truly come to know God, his words, and his works, the more our lives become ripe for transformation.

With practical teaching and relatable storytelling, Faith Simplified unpacks the faith-defining truths of Christianity and their profound bearing on how you live each day. Addressing the curious, the questioning, and the committed alike, author Aaron Armstrong draws on biblical knowledge and centuries of Christian theology to cast light on the faith’s potential to powerfully affect your life.

With abundant insights and engaging discussion questions in every chapter, Faith Simplified will inspire both individuals and groups to embrace faith in fresh, compelling ways. This accessible guide will help you take these truths to heart so you can understand and experience the blessings of Christianity at their fullest.

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Foreword by Trevin Wax

“Aaron presents the heart of the Christian faith in a way that’s clear, engaging, and—most importantly—faithful. He’s not interested in watering down concepts or lecturing through a surface-level overview. No, this book digs down to the essential truths of Christianity. But in a way that makes them accessible without being superficial. Aaron doesn’t shy away from the complexity of our faith, but he also doesn’t let it become a barrier to those just beginning on their journey.”

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What People Are Saying About Faith Simplified

In Faith Simplified, Aaron Armstrong blends clarity with theological depth, offering readers an accessible exploration of foundational Christian truths. With pastoral warmth, he addresses complex topics like the Trinity, the nature of Scripture, and God’s redemptive plan through the gospel of Jesus Christ. Armstrong’s engaging style invites readers—whether new to the faith or longtime believers—to live with greater devotion, confidence, and joy in the gospel.

Justin S. Holcomb, PhDEpiscopal Bishop,
Seminary Professor, and Author

Aaron Armstrong’s Faith Simplified is a conversation meant to reach those who are curious, questioning, and committed. Armstrong fulfills his purpose with a profound simplicity. His rich theological insight and attention to Scripture provides ballast as he considers some of life’s deepest questions and many of today’s most wily topics. The questions at the end of every chapter engage the reader and provide conversation points for small groups.

Cas Monaco, PhDVice President of Missiology and Gospel Engagement at FamilyLife®

Aaron writes with good-natured humor and a strong grasp on biblical scholarship and theology. This book is accessible without compromising depth. A great resource for anyone looking to understand the Christian faith.

Kristen AcevedoAuthor and Discipleship Director at Transformation Church

Aaron Armstrong’s Faith Simplified is a masterful invitation into the richness of Christian doctrine. This Christ-saturated book combines theological depth with accessible language, making it an invaluable resource for new believers seeking clarity and mature readers desiring fresh insights. Armstrong stands firmly on the historical convictions of the Christian faith, presenting them in a memorable and transformative way. Readers will walk away from this book not only understanding their faith but inspired to live it out with conviction and joy.

Jamaal E. WilliamsLead Pastor, Sojourn Church Midtown;
President, Harbor Network;
coauthor, In Church as It Is in Heaven