He that overcometh, the same shall be clothed in white raiment; and I will not blot out his name out of the book of life, but I will confess his name before my Father, and before his angels.

Revelation 3:5

If you die and have not asked Jesus to forgive your sins

then your name is not written in the book of life

you will now live for eternity in flames

in hell

Everyone has free will to choose to believe or not

Passages Referring to the Book of Life

PSALM 69:28

“Let them be blotted out of the book of the living, and not be written with the righteous.”

DANIEL 12:1

“Now at that time Michael, the great prince who stands guard over the sons of your people, will arise. And there will be a time of distress such as never occurred since there was a nation until that time; and at that time your people, everyone who is found written in the book, will be rescued.” Though the word “life” or “living” is not used here, it is part of the same concept.

LUKE 10:20

In the gospels Christ says, “… but rejoice that your names are recorded in heaven” “Are recorded” is a perfect tense and looks at an abiding condition. This is evidently another reference to the book of life.

PHILIPPIANS 4:3

Paul speaks of “the rest of my fellow workers, whose names are in the 

book of life.”

REVELATION 3:5

“I will not erase his name from the book of life.”

REVELATION 13:8

“all who dwell on the earth will worship him (the beast), everyone whose name has not been written from the foundation of the world in the book of life of the Lamb who has been slain.”

REVELATION 17:8

And those who dwell on the earth will wonder, whose name has not been written in the book of life from the foundation of the world, when they see the beast, that he was and is not and will come.”

REVELATION 20:12

“And I saw the dead, the great and the small, standing before the throne, and books were opened; and another book was opened, which is the book of life; and the dead were judged from the things which were written in the books, according to their deeds.”

REVELATION 20:15

“And if anyone’s name was not found written in the book of life

he was thrown into the lake 

of fire.”