Another strong argument is to be noticed concerning the Lamb's book of life. The disciples were told to rejoice, not so much over the fact that the demons were subject to them, but that their names were written in the Lamb's book of life. This book is a catalogue of the elect, determined by the unalterable counsel of God, and can neither be increased nor diminished. The names of the righteous are found there; but the names of those who perish have never been written there from the foundation of the world. God does not make the mistake of writing in the book of life a name which He will later have to blot out. Hence none of the Lord's own ever perish. Jesus told His disciples to find their chief joy in the fact that their names were written in heaven, Luke 10:20; yet there would have been small grounds for joy in this respect if their names written in heaven one day could have been blotted out the next. Paul wrote to the Philippians, "Our citizenship is in heaven," 3:20; and to Timothy he wrote, "The Lord knoweth them that are His," 2 Timothy 2:19. For the Scripture teaching concerning the book of life, see Luke 10:20; Philippians 4:3; Revelation 3:5; 13:8; 17:8; 20:12-15; 21:27.
Thank you so much, Dr. Eckleburg, for such a great link! I can't wait to study it. :)