About This Book
Deceptive Diagnosis: When Sin Is Called Sickness exposes how modern psychology often mislabels sinful behavior as medical or emotional disorders. Written by David M. Tyler, PhD, and Kurt P. Grady, Pharm.D., this book challenges the assumption that human problems are best understood through diagnostic labels rather than through God’s Word.
Drawing from Scripture, biblical counseling, and professional insight into the pharmaceutical industry, the authors explain why only the Bible reveals the true source of human struggle and how God’s Word provides genuine hope and lasting change.
In contrast to modern psychology, Deceptive Diagnosis helps believers, pastors, and counselors think biblically about human problems, repentance, and healing. Using clear biblical reasoning and real-life examples, Tyler and Grady contrast psychological theories with biblical truth, showing how the gospel, not human wisdom, transforms the heart.
Deceptive Diagnosis – When Sin is Called Sickness
Price range: $5.99 through $11.95
Modern psychology increasingly labels moral, spiritual, and relational problems as medical sickness.
In Deceptive Diagnosis: When Sin Is Called Sickness, biblical counselors David M. Tyler, PhD, and Kurt P. Grady, Pharm.D., expose how biblical categories of sin and responsibility have been replaced by psychiatric diagnoses, and call Christians back to God’s sufficient Word.
Reader Endorsement
“If you are a Christian, and especially a pastor… this is a must read. Pastors have been led to believe that they can’t help people with the everyday problems of life; they need to be sent to the ‘professionals.’ But are the ‘professionals’ really helping people all that much, or is the whole idea of ‘mental illness’ just a useful lie? This book sets the record straight. Dr. Tyler is a godly man who has been helping people with problems for years and he desires to set the record straight when it comes to psychology vs. true biblical counseling. Check out Tyler’s book… the Word of God truly is sufficient!”
— W. A. Toney, United States
What Readers Are Saying
“Best book ever! … Sin has become labeled as disease… Who needs a Savior then? BUY THE BOOK!!!”
— SNP, United States
“A must read for all sincere Christians.”
— Skiboo, United Kingdom
“The authors expose modern psychoanalysis in a readable and understandable way while offering real hope grounded in truth.”
— Michael W. Warriner
“If you want clarity in a culture of confusion, this book is essential.”
— Michael W. Warriner
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“A must read for pastors and biblical counselors.”
— Skiboo, United Kingdom
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“Dr. Tyler brings biblical conviction and compassion together in a way that is desperately needed.”
— SNP, United States





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