how does a spirit suffer in fire?
Ecc 12:7 Then shall the dust return to the earth as it was: and the spirit shall return unto God who gave it.
The spirit of people do not burn in hell, for all spirits go back to God who gave them regardless of how the person behaved on earth, so the saints, and the heathen, will not retain their spirit in the afterlife, and will not be a part of them, which the spirit is probably our connection with God on this earth, for He will not have a relationship with us according to our flesh.
The flesh will return to the dust from where it came.
Gen 2:7 And the LORD God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul.
Mat 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.
Rev 6:9 And when he had opened the fifth seal, I saw under the altar the souls of them that were slain for the word of God, and for the testimony which they held:
Rev 6:10 And they cried with a loud voice, saying, How long, O Lord, holy and true, dost thou not judge and avenge our blood on them that dwell on the earth?
Rev 6:11 And white robes were given unto every one of them; and it was said unto them, that they should rest yet for a little season, until their fellowservants also and their brethren, that should be killed as they were, should be fulfilled.
The soul will be the only thing that remains to live forever in heaven, or hell.
But I do not believe it is the soul that burns in the fire.
Isa 66:24 And they shall go forth, and look upon the carcases of the men that have transgressed against me: for their worm shall not die, neither shall their fire be quenched; and they shall be an abhorring unto all flesh.
The heathen's worm shall not die, which means although the flesh returns to the dust from where it came they will feel the affects of the flesh for all eternity, and will feel the fire as the flesh feels the fire, for they loved the world, and the ways of the world according to the flesh, so they are stuck with the affects of the flesh for eternity.
1Co 15:44 It is sown a natural body; it is raised a spiritual body. There is a natural body, and there is a spiritual body.
1Co 15:49 And as we have borne the image of the earthy, we shall also bear the image of the heavenly.
The saints will be a soul with a spiritual body in heaven.
Mat 3:11 I indeed baptize you with water unto repentance: but he that cometh after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and with fire.
All sin must be purged with fire, and the saints have fire put upon them also by the Holy Ghost to purge them.
That is why the earth shall be burned up, and all the works that is therein, for it is tainted with sin by people, and the heavens shall melt with fervent heat, for it tainted with sin by the fallen angels.
And there will be a new heaven, and a new earth, where sin has never been, and sin will never be.