Revelation 20:13-15

13  And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.

14  And death and hell were cast into the lake of fire. This is the second death.

15  And whosoever was not found written in the book of life was cast into the lake of fire.

Everyone is judged and whoever is not found written in the book of life is cast into the lake of fire, and death and hell were also cast into the Lake of Fire. The Lake of Fire is the second death. After the judgment, death and hell (the temporary abode of the dead) are themselves cast into the Lake of Fire. These things will no longer be found in God’s new creation. Revelation 20:15 makes it clear that  all who are not found written in the book of life will be cast into the Lake of Fire forever.  As far as those in His new creation are concerned, those in the Lake of Fire will no longer exist or even come to mind but for those dwelling in the Lake of Fire will exist for eternity in their fallen condition without any hope of fellowship with God. This is what Jesus warned people about when He warned:

Matthew 10:28  And fear not them which kill the body, but are not able to kill the  soul: but rather fear him which is able to destroy both  soul  and body in hell.

Matthew 16:26  For what is a man profited, if he shall gain the whole world, and lose his own soul? or what shall a man give in exchange for his soul?

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