What happens to those not written in the Lamb's book of life?

The scripture teaches that those whose names are not written in the Lamb's book of life will face eternal judgment. Revelation 20:15 states that anyone not found written in the book will be cast into the lake of fire. This aligns with the teaching that all humanity is guilty before God due to sin and, unless redeemed, will face the consequences of that sin, which is eternal separation from God in hell. This emphasizes the gravity of being elect and the eternal consequences of remaining in a state of sin.