This book teaches that every believer can find strength and peace in trials through faith in Christ, as stated in the chapters, indicating that this book aims to provide spiritual comfort to people who are experiencing difficulties in their lives. This book suggests that believers can seek and find comfort and strength from God in the midst of all the difficulties they face, instead of feeling alone. The message conveyed 'In the world you will have trouble. But be of good courage! I have overcome the world,' which means that Christians can be courageous because Christ has overcome the world.