How do we know that the Lamb's Book of Life is true?

The Lamb's Book of Life is a profound reality within Christian doctrine, confirmed multiple times in Scripture, including verses such as Ephesians 1:4, which states that believers were chosen in Christ before the foundation of the world. This book signifies God's sovereign electing grace, where the names of His chosen people are written, demonstrating His purpose and plan for salvation. It is not merely symbolic; it reflects God's eternal decree and serves as the basis for assurance for believers, who know they are in Christ and thus free from judgment, as their sins have been fully atoned for.