How do we know we are written in the Book of Life?

Assurance of being in the Book of Life is rooted in one's relationship with Christ and the transformative power of the gospel. As mentioned in 1 Thessalonians 1:4, knowing your election comes from experiencing the gospel's impact in your life, which is accompanied by faith and the work of the Holy Spirit. If you believe in Christ and love His truth, it is a strong indication that your name is written in the Book of Life, as God's people rejoice in their salvation and seek after Him. This assurance is a work of grace that allows believers to find confidence in God's promises.