.
In Jesus' case, mortality/immortality pertained only to his body rather than
to both his body and himself. Were that not so, then Jesus would've ceased
to exist when he expired on the cross, and in order to restore his corpse to
life; it would've been first necessary to restore the man himself to life.
Jehovah's Witnesses teach that human life is entirely physical which, for
them, isn't exactly true. They hold to something called "life force" which is a
supernatural power that can be taken from a spirit being's body, transferred
to a human's body, and then transferred back again to the spirit being's
body when the human's body expires.
The JW life force suggests an interesting possibility. Supposing when folks
are terminated in the lake of fire per Rev 20:11-15, their life force survives
to be transferred to a spirit body; enabling them to be perfectly suited to
join the Devil and his angels per Matt 25:41, thus keeping the damned in
existence for as long as God deems necessary to accomplish retribution for
their works per Rev 20:12.
_
It is clear from James 2:26 that the spirit of people exists beyond the dead body. In fact, Jesus went to preach to the dead. One can not preach to shomeone who is in a comma.
Isaiah 14:4-11
Douay-Rheims 1899 American Edition
4 Thou shalt take up this parable against the king of Babylon, and shalt say: How is the oppressor come to nothing, the tribute hath ceased?
5 The Lord hath broken the staff of the wicked, the rod of the rulers,
6 That struck the people in wrath with an incurable wound, that brought nations under in fury, that persecuted in a cruel manner.
7 The whole earth is quiet and still, it is glad and hath rejoiced.
8 The fir trees also have rejoiced over thee, and the cedars of Libanus, saying: Since thou hast slept, there hath none come up to cut us down.
9 Hell below was in an uproar to meet thee at thy coming, it stirred up the giants for thee. All the princes of the earth are risen up from their thrones, all the princes of nations.
10 All shall answer, and say to thee: Thou also art wounded as well as we, thou art become like unto us.
11 Thy pride is brought down to hell, thy carcass is fallen down: under thee shall the moth be strewed, and worms shall be thy covering.