Struggling with Repentance & Being Forgiven: Caller suggests that one read Acts 2:38, if they are struggling with repentance [Acts 2:38]. Lamb's Book of Life: What do you think is written on the back of the "Lamb's Book of Life"? [Revelation 5:1, Revelation 3, Revelation 6, Matthew 23:32], Book of Life: When is the "Book of Life" opened? [Revelation 20:12].