After the wicked have been raised to be judged at the Great White Throne Judgment and because their names are not found written in the Book of Life, they are sentenced to die again, that is, their souls and spirits are separated from their bodies and then they go to the Lake of Fire without material bodies.

         Because a 'soul' and a 'spirit' are fireproof, they can remain in the flames of a literal fire for all eternity without being consumed. 

                This is the doom of the wicked!