What does the Bible say about the Lamb's book of life?

The Lamb's book of life is a vital concept in Scripture, representing a record of individuals whom God has chosen before the foundation of the world. Revelation 21:27 states that only those whose names are written in this book will enter the New Jerusalem, emphasizing the sovereign grace of God in salvation. This underscores the belief that entry into heaven is based solely on God's election, not on human merit or works. Ephesians 1:4-5 further clarifies that God predestines individuals, illustrating His sovereignty in the salvation process. In Acts 13:48, we see that those who were ordained to eternal life believed, highlighting the connection between divine election and faith.