Some may wonder why a loving God would cast someone into a lake of fire. God loved Adam and Eve, but they had the choice to sin or not to sin. They chose to sin, due to deception by Satan the devil. Since they sinned, death entered the human race (Gen 3:19).
So it is now. We have the choice of accepting Jesus Christ and repenting of and leaving our sins, or we can reject the gift of life and be thrown into the lake of fire on judgement day (Revelation 20:15, Matthew 25:41). As you can see, the lake of fire would not be a great place to spend an afternoon, let alone an eternity!
Rather than fear death, we not need worry about what happens after we die. If we follow God's commandments, we can have what many seek but few find......WORRY FREE LIVING!!